20230428
- Bugfix (defect introduced: Postfix 1.0): the command 'postconf
- .. name=v1 .. name=v2 ..' (multiple instances of the same
+ Bugfix (defect introduced: Postfix 1.0): the command "postconf
+ .. name=v1 .. name=v2 .." (multiple instances of the same
parameter name) created multiple name=value entries with
the same parameter name. It now logs a warning and skips
the earlier update. Found during code maintenance. File:
postconf/postconf_edit.c
- Bugfix (defect introduced: Postfix 3.3): the command 'postconf
- -M name1/type1='name2 type2 ..." died with a segmentation
+ Bugfix (defect introduced: Postfix 3.3): the command "postconf
+ -M name1/type1='name2 type2 ...'" died with a segmentation
violation when the request matched multiple master.cf
entries. The master.cf file was not damaged. Problem reported
by SATOH Fumiyasu. File: postconf/postconf_master.c.
20230502
Bugfix (defect introduced: Postfix 2.11): the command
- 'postconf -M name1/type1="name2 type2 ...'" could add a
+ "postconf -M name1/type1='name2 type2 ...'" could add a
service definition to master.cf that conflicted with an
already existing service definition. It now replaces all
existing service definitions that match the service pattern
'name1/type1' or the service name and type in 'name2 type2
...' with a single service definition 'name2 type2 ...'.
Problem reported by SATOH Fumiyasu. File: postconf/postconf_edit.c.
+
+20230503
+
+ Documentation: clarified the relationship between
+ smtp_bind*address, inet_interfaces, and system-chosen source
+ IP addresses for outbound SMTP/LMTP connections. File:
+ proto/postconf.proto.
+
+20230504
+
+ Documentation: clarified the relationships between
+ local_transport, virtual_mailbox_transport, relay_trainsport,
+ default_transport, relay_host, sender_dependent_relayhost_maps,
+ sender_dependent_default_transport_maps, and their precedences
+ when determining a delivery transport or next-hop destination.
+ Files: proto/postconf.5.html, proto/ADDRESS_REWRITING_README.html.
* Address rewriting when mail is delivered
- o Resolve address to destination
- o Mail transport switch
+ o Resolve address to (transport, next-hop destination)
o Relocated users table
* Address rewriting with remote delivery
is received". Once you've finished reading the remainder of this document, the
table will help you to quickly find what you need.
- _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b
- |A\bAd\bdd\bdr\bre\bes\bss\bs |S\bSc\bco\bop\bpe\be |D\bDa\bae\bem\bmo\bon\bn |G\bGl\blo\bob\bba\bal\bl t\btu\bur\brn\bn-\b-o\bon\bn |S\bSe\bel\ble\bec\bct\bti\biv\bve\be t\btu\bur\brn\bn-\b-o\bof\bff\bf c\bco\bon\bnt\btr\bro\bol\bl |
- |m\bma\ban\bni\bip\bpu\bul\bla\bat\bti\bio\bon\bn| | |c\bco\bon\bnt\btr\bro\bol\bl | |
- |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
- |Rewrite | |trivial-|append_at_myorigin, | |
- |addresses to|all mail|rewrite |append_dot_mydomain,|local_header_rewrite_clients,|
- |standard | |(8) |swap_bangpath, |remote_header_rewrite_domain |
- |form | | |allow_percent_hack | |
- |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
- |Canonical | |cleanup | |receive_override_options, |
- |address |all mail|(8) |canonical_maps |local_header_rewrite_clients,|
- |mapping | | | |remote_header_rewrite_domain |
- |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
- |Address | |cleanup | |receive_override_options, |
- |masquerading|all mail|(8) |masquerade_domains |local_header_rewrite_clients,|
- | | | | |remote_header_rewrite_domain |
- |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
- |Automatic | |cleanup |always_bcc, | |
- |BCC |new mail|(8) |sender_bcc_maps, |receive_override_options |
- |recipients | | |recipient_bcc_maps | |
- |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
- |Virtual |all mail|cleanup |virtual_alias_maps |receive_override_options |
- |aliasing | |(8) | | |
- |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
- |Resolve | |trivial-| | |
- |address to |all mail|rewrite |none |none |
- |destination | |(8) | | |
- |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
- |Mail | |trivial-| | |
- |transport |all mail|rewrite |transport_maps |none |
- |switch | |(8) | | |
- |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
- |Relocated | |trivial-| | |
- |users table |all mail|rewrite |relocated_maps |none |
- | | |(8) | | |
- |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
- |Generic |outgoing| | | |
- |mapping |SMTP |smtp(8) |smtp_generic_maps |none |
- |table |mail | | | |
- |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
- |Local alias |local | | | |
- |database |mail |local(8)|alias_maps |none |
- | |only | | | |
- |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
- |Local per- |local | | | |
- |user |mail |local(8)|forward_path |none |
- |.forward |only | | | |
- |files | | | | |
- |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
- |Local catch-|local | | | |
- |all address |mail |local(8)|luser_relay |none |
- | |only | | | |
- |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
+ _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b
+ |A\bAd\bdd\bdr\bre\bes\bss\bs |S\bSc\bco\bop\bpe\be |D\bDa\bae\bem\bmo\bon\bn |T\bTu\bur\brn\bn-\b-o\bon\bn c\bco\bon\bnt\btr\bro\bol\bls\bs |T\bTu\bur\brn\bn-\b-o\bof\bff\bf c\bco\bon\bnt\btr\bro\bol\bls\bs |
+ |m\bma\ban\bni\bip\bpu\bul\bla\bat\bti\bio\bon\bn| | | | |
+ |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
+ |Rewrite | |trivial-|append_at_myorigin, | |
+ |addresses to|all mail|rewrite |append_dot_mydomain, swap_bangpath, |local_header_rewrite_clients,|
+ |standard | |(8) |allow_percent_hack |remote_header_rewrite_domain |
+ |form | | | | |
+ |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
+ |Canonical | |cleanup | |receive_override_options, |
+ |address |all mail|(8) |canonical_maps |local_header_rewrite_clients,|
+ |mapping | | | |remote_header_rewrite_domain |
+ |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
+ |Address | |cleanup | |receive_override_options, |
+ |masquerading|all mail|(8) |masquerade_domains |local_header_rewrite_clients,|
+ | | | | |remote_header_rewrite_domain |
+ |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
+ |Automatic | |cleanup |always_bcc, sender_bcc_maps, | |
+ |BCC |new mail|(8) |recipient_bcc_maps |receive_override_options |
+ |recipients | | | | |
+ |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
+ |Virtual |all mail|cleanup |virtual_alias_maps |receive_override_options |
+ |aliasing | |(8) | | |
+ |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
+ |Resolve | | |local_transport, virtual_transport, | |
+ |address to | |trivial-|relay_transport, default_transport, | |
+ |(transport, |all mail|rewrite |relayhost, |content_filter |
+ |next-hop | |(8) |sender_dependent_relayhost_maps, | |
+ |destination)| | |sender_dependent_default_transport_maps| |
+ |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
+ |Relocated | |trivial-| | |
+ |users table |all mail|rewrite |relocated_maps |none |
+ | | |(8) | | |
+ |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
+ |Generic |outgoing| | | |
+ |mapping |SMTP |smtp(8) |smtp_generic_maps |none |
+ |table |mail | | | |
+ |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
+ |Local alias |local | | | |
+ |database |mail |local(8)|alias_maps |none |
+ | |only | | | |
+ |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
+ |Local per- |local | | | |
+ |user |mail |local(8)|forward_path |none |
+ |.forward |only | | | |
+ |files | | | | |
+ |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
+ |Local catch-|local | | | |
+ |all address |mail |local(8)|luser_relay |none |
+ | |only | | | |
+ |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
A\bAd\bdd\bdr\bre\bes\bss\bs r\bre\bew\bwr\bri\bit\bti\bin\bng\bg w\bwh\bhe\ben\bn m\bma\bai\bil\bl i\bis\bs r\bre\bec\bce\bei\biv\bve\bed\bd
Address manipulations at this stage are:
- * Resolve address to destination
- * Mail transport switch
+ * Resolve address to (transport, next-hop destination)
* Relocated users table
Each Postfix delivery agent tries to deliver the mail to its destination, while
The remainder of this document presents each address manipulation step in more
detail, with specific examples or with pointers to documentation with examples.
-R\bRe\bes\bso\bol\blv\bve\be a\bad\bdd\bdr\bre\bes\bss\bs t\bto\bo d\bde\bes\bst\bti\bin\bna\bat\bti\bio\bon\bn
+R\bRe\bes\bso\bol\blv\bve\be a\bad\bdd\bdr\bre\bes\bss\bs t\bto\bo (\b(t\btr\bra\ban\bns\bsp\bpo\bor\brt\bt,\b, n\bne\bex\bxt\bt-\b-h\bho\bop\bp d\bde\bes\bst\bti\bin\bna\bat\bti\bio\bon\bn)\b)
The Postfix qmgr(8) queue manager selects new mail from the incoming queue or
-old mail from the deferred queue, and asks the trivial-rewrite(8) address
-rewriting and resolving daemon where it should be delivered.
-
-As of version 2.0, Postfix distinguishes four major address classes. Each class
-has its own list of domain names, and each class has its own default delivery
+old mail from the deferred queue. First it looks for overrides:
+
+ * The REDIRECT action in access(5), header_checks(5) or body_checks(5)
+ overrides all recipients of the message, and overrides a content_filter
+ setting, and FILTER action in access(5), header_checks(5) or body_checks
+ (5). The REDIRECT action was implemented as a short-cut to retaliate for
+ abuse.
+
+ * A content_filter setting and FILTER action in access(5), header_checks(5)
+ or body_checks(5) provide their own (transport, next-hop destination)
+ information. This bypasses all the steps that are described in the
+ remainder of this section.
+
+When there is no content filter override, the qmgr(8) queue manager asks the
+trivial-rewrite(8) address rewriting and resolving daemon for each recipient
+how to deliver it (which message delivery transport) and where to deliver it
+(what next-hop destination).
+
+As of version 2.0, Postfix distinguishes four major domain classes. Each class
+has its own list of recipient domain names, and each class has its own delivery
method, as shown in the table below. See the ADDRESS_CLASS_README document for
the fine details. Postfix versions before 2.0 only distinguish between local
delivery and everything else.
- _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b
- |D\bDe\bes\bst\bti\bin\bna\bat\bti\bio\bon\bn d\bdo\bom\bma\bai\bin\bn l\bli\bis\bst\bt |D\bDe\bef\bfa\bau\bul\blt\bt d\bde\bel\bli\biv\bve\ber\bry\by m\bme\bet\bth\bho\bod\bd|A\bAv\bva\bai\bil\bla\bab\bbi\bil\bli\bit\bty\by|
- |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
- |$mydestination, $inet_interfaces,|$local_transport |Postfix 1.0 |
- |$proxy_interfaces | | |
- |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
- |$virtual_mailbox_domains |$virtual_transport |Postfix 2.0 |
- |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
- |$relay_domains |$relay_transport |Postfix 2.0 |
- |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
- |none |$default_transport |Postfix 1.0 |
- |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
-
-M\bMa\bai\bil\bl t\btr\bra\ban\bns\bsp\bpo\bor\brt\bt s\bsw\bwi\bit\btc\bch\bh
-
-Once the trivial-rewrite(8) daemon has determined a default delivery method it
-searches the optional transport(5) table for information that overrides the
-message destination and/or delivery method. Typical use of the transport(5)
-table is to send mail to a system that is not connected to the Internet, or to
-use a special SMTP client configuration for destinations that have special
-requirements. See, for example, the STANDARD_CONFIGURATION_README and
-UUCP_README documents, and the examples in the transport(5) manual page.
-
-Transport table lookups are disabled by default. To enable, edit the
-transport_maps parameter in the main.cf file and specify one or more lookup
-tables, separated by whitespace or commas.
+Note that the table does not match recipients against virtual_alias_domains.
+The reason is that all valid recipients in a virtual alias domain must be
+aliased to an address in a different domain. All other recipients in a virtual
+alias domain are by definition undeliverable, and do not need to be considered
+here.
-Example:
-
- /etc/postfix/main.cf:
- transport_maps = hash:/etc/postfix/transport
+ _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b
+ |D\bDo\bom\bma\bai\bin\bn c\bcl\bla\bas\bss\bs |R\bRe\bec\bci\bip\bpi\bie\ben\bnt\bt d\bdo\bom\bma\bai\bin\bn m\bma\bat\btc\bch\bh |D\bDe\bel\bli\biv\bve\ber\bry\by m\bme\bet\bth\bho\bod\bd |A\bAv\bva\bai\bil\bla\bab\bbi\bil\bli\bit\bty\by|
+ |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
+ | |mydestination, | | |
+ |Local |inet_interfaces, |local_transport |Postfix 1.0 |
+ | |proxy_interfaces | | |
+ |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
+ |Virtual mailbox|virtual_mailbox_domains|virtual_transport|Postfix 2.0 |
+ |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
+ |Relay |relay_domains |relay_transport |Postfix 2.0 |
+ |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
+ |Default |none |default_transport|Postfix 1.0 |
+ |_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
+
+The delivery methods in the above table may include a next-hop destination in
+addition to a delivery transport. This may override the next-hop destination
+that is by default taken from the recipient domain.
+
+Over time, features have been added to override the above transport and/or
+next-hop destination information. The following table lists where a transport
+or next-hop destination may be taken from, depending on the recipient domain
+class.
+
+ _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b
+ |D\bDo\bom\bma\bai\bin\bn |T\bTr\bra\ban\bns\bsp\bpo\bor\brt\bt s\bso\bou\bur\brc\bce\bes\bs (\b(i\bin\bn o\bor\brd\bde\ber\br o\bof\bf |N\bNe\bex\bxt\bt h\bho\bop\bp s\bso\bou\bur\brc\bce\bes\bs (\b(i\bin\bn o\bor\brd\bde\ber\br o\bof\bf d\bde\bes\bsc\bce\ben\bnd\bdi\bin\bng\bg|
+ |c\bcl\bla\bas\bss\bs |d\bde\bes\bsc\bce\ben\bnd\bdi\bin\bng\bg p\bpr\bre\bec\bce\bed\bde\ben\bnc\bce\be)\b) |p\bpr\bre\bec\bce\bed\bde\ben\bnc\bce\be)\b) |
+ |_\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
+ |Local |transport_maps, local_transport |transport_maps, local_transport, |
+ | | |recipient domain |
+ |_\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
+ |Virtual|transport_maps, virtual_transport |transport_maps, virtual_transport, |
+ |mailbox| |recipient domain |
+ |_\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
+ | | |transport_maps, relay_transport, |
+ |Relay |transport_maps, relay_transport |sender_dependent_relayhost_maps, |
+ | | |relayhost, recipient domain |
+ |_\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
+ | | |transport_maps, |
+ | |transport_maps, |sender_dependent_default_transport_maps,|
+ |Default|sender_dependent_default_transport_maps,|default_transport, |
+ | |default_transport |sender_dependent_relayhost_maps, |
+ | | |relayhost, recipient domain |
+ |_\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b|_\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b _\b |
R\bRe\bel\blo\boc\bca\bat\bte\bed\bd u\bus\bse\ber\brs\bs t\bta\bab\bbl\ble\be
<ul>
-<li> <a href="#resolve"> Resolve address to destination </a>
-
-<li> <a href="#transport"> Mail transport switch </a>
+<li> <a href="#resolve"> Resolve address to (transport, next-hop destination) </a>
<li> <a href="#relocated"> Relocated users table </a>
<table border="1">
<tr> <th nowrap> Address manipulation </th> <th nowrap> Scope </th>
-<th> Daemon </th> <th nowrap> Global turn-on control </th> <th nowrap> Selective
-turn-off control </th> </tr>
+<th> Daemon </th> <th nowrap> Turn-on controls </th> <th nowrap>
+Turn-off controls </th> </tr>
<tr> <td> <a href="#standard"> Rewrite addresses to standard form</a>
</td> <td nowrap> all mail </td> <td> <a href="trivial-rewrite.8.html">trivial-<br>rewrite(8)</a> </td>
nowrap> all mail </td> <td> <a href="cleanup.8.html">cleanup(8)</a> </td> <td> <a href="postconf.5.html#virtual_alias_maps">virtual_alias_maps</a>
</td> <td> <a href="postconf.5.html#receive_override_options">receive_override_options</a> </td> </tr>
-<tr> <td> <a href="#resolve"> Resolve address to destination </a>
-</td> <td nowrap> all mail </td> <td> <a href="trivial-rewrite.8.html">trivial-<br>rewrite(8)</a> </td>
-<td> none </td> <td> none </td> </tr>
-
-<tr> <td> <a href="#transport"> Mail transport switch</a> </td>
-<td nowrap> all mail </td> <td> <a href="trivial-rewrite.8.html">trivial-<br>rewrite(8)</a> </td> <td>
-<a href="postconf.5.html#transport_maps">transport_maps</a> </td> <td> none </td> </tr>
+<tr> <td> <a href="#resolve"> Resolve address to (transport, next-hop
+destination) </a> </td> <td nowrap> all mail </td> <td>
+<a href="trivial-rewrite.8.html">trivial-<br>rewrite(8)</a> </td> <td> <a href="postconf.5.html#local_transport">local_transport</a>, <a href="postconf.5.html#virtual_transport">virtual_transport</a>,
+<a href="postconf.5.html#relay_transport">relay_transport</a>, <a href="postconf.5.html#default_transport">default_transport</a>, <a href="postconf.5.html#relayhost">relayhost</a>,
+<a href="postconf.5.html#sender_dependent_relayhost_maps">sender_dependent_relayhost_maps</a>, <a href="postconf.5.html#sender_dependent_default_transport_maps">sender_dependent_default_transport_maps</a>
+</td> <td> <a href="postconf.5.html#content_filter">content_filter</a> </td> </tr>
<tr> <td> <a href="#relocated"> Relocated users table</a> </td>
<td nowrap> all mail </td> <td> <a href="trivial-rewrite.8.html">trivial-<br>rewrite(8)</a> </td> <td>
<ul>
-<li> <a href="#resolve"> Resolve address to destination </a>
-
-<li> <a href="#transport"> Mail transport switch</a>
+<li> <a href="#resolve"> Resolve address to (transport, next-hop
+destination) </a>
<li> <a href="#relocated"> Relocated users table</a>
step in more detail, with specific examples or with pointers to
documentation with examples. </p>
-<h3> <a name="resolve"> Resolve address to destination </a> </h3>
+<h3> <a name="resolve"> Resolve address to (transport, next-hop
+destination) </a> </h3>
<p> The Postfix <a href="qmgr.8.html">qmgr(8)</a> queue manager selects new mail from the
-<a href="QSHAPE_README.html#incoming_queue">incoming queue</a> or old mail from the <a href="QSHAPE_README.html#deferred_queue">deferred queue</a>, and asks the
-<a href="trivial-rewrite.8.html">trivial-rewrite(8)</a> address rewriting and resolving daemon where it
-should be delivered. </p>
+<a href="QSHAPE_README.html#incoming_queue">incoming queue</a> or old mail from the <a href="QSHAPE_README.html#deferred_queue">deferred queue</a>. First it
+looks for overrides: </p>
+
+<ul>
+
+<li> <p> The REDIRECT action in <a href="access.5.html">access(5)</a>, <a href="header_checks.5.html">header_checks(5)</a> or
+<a href="header_checks.5.html">body_checks(5)</a> overrides all recipients of the message, and overrides
+a <a href="postconf.5.html#content_filter">content_filter</a> setting, and FILTER action in <a href="access.5.html">access(5)</a>,
+<a href="header_checks.5.html">header_checks(5)</a> or <a href="header_checks.5.html">body_checks(5)</a>. The REDIRECT action was implemented
+as a short-cut to retaliate for abuse. </p>
-<p> As of version 2.0, Postfix distinguishes four major address
-classes. Each class has its own list of domain names, and each
-class has its own default delivery method, as shown in the table
-below. See the <a href="ADDRESS_CLASS_README.html">ADDRESS_CLASS_README</a> document for the fine details.
-Postfix versions before 2.0 only distinguish between local delivery
-and everything else. </p>
+<li> <p> A <a href="postconf.5.html#content_filter">content_filter</a> setting and FILTER action in <a href="access.5.html">access(5)</a>,
+<a href="header_checks.5.html">header_checks(5)</a> or <a href="header_checks.5.html">body_checks(5)</a> provide their own (transport,
+next-hop destination) information. This bypasses all the steps that
+are described in the remainder of this section. </p>
+
+</ul>
+
+<p> When there is no content filter override, the <a href="qmgr.8.html">qmgr(8)</a> queue
+manager asks the <a href="trivial-rewrite.8.html">trivial-rewrite(8)</a> address rewriting and resolving
+daemon for each recipient how to deliver it (which message delivery
+transport) and where to deliver it (what next-hop destination). </p>
+
+<p> As of version 2.0, Postfix distinguishes four major domain
+classes. Each class has its own list of recipient domain names, and
+each class has its own delivery method, as shown in the table below.
+See the <a href="ADDRESS_CLASS_README.html">ADDRESS_CLASS_README</a> document for the fine details. Postfix
+versions before 2.0 only distinguish between local delivery and
+everything else. </p>
+
+<p> Note that the table does not match recipients against
+<a href="postconf.5.html#virtual_alias_domains">virtual_alias_domains</a>. The reason is that all valid recipients in
+a <a href="ADDRESS_CLASS_README.html#virtual_alias_class">virtual alias domain</a> must be aliased to an address in a different
+domain. All other recipients in a <a href="ADDRESS_CLASS_README.html#virtual_alias_class">virtual alias domain</a> are by
+definition undeliverable, and do not need to be considered here.
+</p>
<blockquote>
<table border="1">
-<tr><th align="left">Destination domain list </th> <th
-align="left">Default delivery method </th> <th>Availability
-</th> </tr>
+<tr> <th align="left">Domain class</th> <th align="left">Recipient
+domain match </th> <th> Delivery method </th> <th>Availability </th>
+</tr>
-<tr><td>$<a href="postconf.5.html#mydestination">mydestination</a>, $<a href="postconf.5.html#inet_interfaces">inet_interfaces</a>, $<a href="postconf.5.html#proxy_interfaces">proxy_interfaces</a> </td>
-<
td>$<a href="postconf.5.html#local_transport">local_transport</a> </td> <td>Postfix 1.0</td></tr>
+<tr><td>Local</td> <td><a href="postconf.5.html#mydestination">mydestination</a>, <a href="postconf.5.html#inet_interfaces">inet_interfaces</a>, <a href="postconf.5.html#proxy_interfaces">proxy_interfaces</a>
+<
/td> <td><a href="postconf.5.html#local_transport">local_transport</a> </td> <td>Postfix 1.0</td></tr>
-<tr><td>$<a href="postconf.5.html#virtual_mailbox_domains">virtual_mailbox_domains</a> </td> <td>$<a href="postconf.5.html#virtual_transport">virtual_transport</a> </td>
-<td>Postfix 2.0</td> </tr>
+<tr><td>Virtual mailbox</td> <td><a href="postconf.5.html#virtual_mailbox_domains">virtual_mailbox_domains</a> </td>
+<td><a href="postconf.5.html#virtual_transport">virtual_transport</a> </td> <td>Postfix 2.0</td> </tr>
-<tr><td>$<a href="postconf.5.html#relay_domains">relay_domains</a> </td> <td>$<a href="postconf.5.html#relay_transport">relay_transport</a> </td> <td>Postfix
-2.0</td> </tr>
+<tr><td>Relay</td> <td><a href="postconf.5.html#relay_domains">relay_domains</a> </td> <td><a href="postconf.5.html#relay_transport">relay_transport</a>
+</td> <td>Postfix 2.0</td> </tr>
-<tr><td>none </td> <td>$<a href="postconf.5.html#default_transport">default_transport</a> </td> <td>Postfix 1.0</td>
-</tr>
+<tr><td>Default</td><td> none </td> <td><a href="postconf.5.html#default_transport">default_transport</a> </td>
+<td>Postfix 1.0</td> </tr>
</table>
</blockquote>
-<h3> <a name="transport"> Mail transport switch </a> </h3>
+<p> The delivery methods in the above table may include a next-hop
+destination in addition to a delivery transport. This may override
+the next-hop destination that is by default taken from the recipient
+domain. </p>
-<p> Once the <a href="trivial-rewrite.8.html">trivial-rewrite(8)</a> daemon has determined a default
-delivery method it searches the optional <a href="transport.5.html">transport(5)</a> table for
-information that overrides the message destination and/or delivery
-method. Typical use of the <a href="transport.5.html">transport(5)</a> table is to send mail to
-a system
-that is not connected to the Internet, or to use a special SMTP
-client configuration for destinations that have special requirements.
-See, for example, the <a href="STANDARD_CONFIGURATION_README.html">STANDARD_CONFIGURATION_README</a> and <a href="UUCP_README.html">UUCP_README</a>
-documents, and the examples in the <a href="transport.5.html">transport(5)</a> manual page. </p>
+<p> Over time, features have been added to override the above
+transport and/or next-hop destination information. The following
+table lists where a transport or next-hop destination may be taken
+from, depending on the recipient domain class. </p>
-<p> Transport table lookups are disabled by default. To enable,
-edit the <a href="postconf.5.html#transport_maps">transport_maps</a> parameter in the <a href="postconf.5.html">main.cf</a> file and specify
-one or more lookup tables, separated by whitespace or commas. </p>
+<blockquote>
-<p> Example: </p>
+<table border="1">
+
+<tr> <th>Domain class</th> <th>Transport sources (in order of
+descending precedence)</th> <th> Next hop sources (in order of
+descending precedence)</th> </tr>
+
+<tr> <td> Local </td> <td> <a href="postconf.5.html#transport_maps">transport_maps</a>, <a href="postconf.5.html#local_transport">local_transport</a></td>
+<td> <a href="postconf.5.html#transport_maps">transport_maps</a>, <a href="postconf.5.html#local_transport">local_transport</a>, recipient domain</td> </tr>
+
+<tr> <td> Virtual mailbox </td> <td> <a href="postconf.5.html#transport_maps">transport_maps</a>,
+<a href="postconf.5.html#virtual_transport">virtual_transport</a></td> <td> <a href="postconf.5.html#transport_maps">transport_maps</a>, <a href="postconf.5.html#virtual_transport">virtual_transport</a>,
+recipient domain</td> </tr>
+
+<tr> <td> Relay </td> <td> <a href="postconf.5.html#transport_maps">transport_maps</a>, <a href="postconf.5.html#relay_transport">relay_transport</a></td>
+<td> <a href="postconf.5.html#transport_maps">transport_maps</a>, <a href="postconf.5.html#relay_transport">relay_transport</a>, <a href="postconf.5.html#sender_dependent_relayhost_maps">sender_dependent_relayhost_maps</a>,
+<a href="postconf.5.html#relayhost">relayhost</a>, recipient domain</td> </tr>
+
+<tr> <td> Default </td> <td> <a href="postconf.5.html#transport_maps">transport_maps</a>,
+<a href="postconf.5.html#sender_dependent_default_transport_maps">sender_dependent_default_transport_maps</a>, <a href="postconf.5.html#default_transport">default_transport</a></td>
+<td> <a href="postconf.5.html#transport_maps">transport_maps</a>, <a href="postconf.5.html#sender_dependent_default_transport_maps">sender_dependent_default_transport_maps</a>,
+<a href="postconf.5.html#default_transport">default_transport</a>, <a href="postconf.5.html#sender_dependent_relayhost_maps">sender_dependent_relayhost_maps</a>, <a href="postconf.5.html#relayhost">relayhost</a>,
+recipient domain</td> </tr>
+
+</table>
-<blockquote>
-<pre>
-/etc/postfix/<a href="postconf.5.html">main.cf</a>:
- <a href="postconf.5.html#transport_maps">transport_maps</a> = <a href="DATABASE_README.html#types">hash</a>:/etc/postfix/transport
-</pre>
</blockquote>
<h3> <a name="relocated"> Relocated users table </a> </h3>
<p>
The default mail delivery transport and next-hop destination for
-destinations that do not match $<a href="postconf.5.html#mydestination">mydestination</a>, $<a href="postconf.5.html#inet_interfaces">inet_interfaces</a>,
+the <a href="ADDRESS_CLASS_README.html#default_domain_class">default domain</a> class: recipient domains that do not match
+$<a href="postconf.5.html#mydestination">mydestination</a>, $<a href="postconf.5.html#inet_interfaces">inet_interfaces</a>,
$<a href="postconf.5.html#proxy_interfaces">proxy_interfaces</a>, $<a href="postconf.5.html#virtual_alias_domains">virtual_alias_domains</a>, $<a href="postconf.5.html#virtual_mailbox_domains">virtual_mailbox_domains</a>,
-or $<a href="postconf.5.html#relay_domains">relay_domains</a>. This information can be overruled with the
-<a href="postconf.5.html#sender_dependent_default_transport_maps">sender_dependent_default_transport_maps</a> parameter and with the
-<a href="transport.5.html">transport(5)</a> table. </p>
+or $<a href="postconf.5.html#relay_domains">relay_domains</a>. This information will not be used when
+<a href="postconf.5.html#sender_dependent_default_transport_maps">sender_dependent_default_transport_maps</a> returns a result, and may
+
be overridden with the <a href="transport.5.html">transport(5)</a> table. </p>
-<p>
-In order of decreasing precedence, the nexthop destination is taken
-from $<a href="postconf.5.html#sender_dependent_default_transport_maps">sender_dependent_default_transport_maps</a>, $<a href="postconf.5.html#default_transport">default_transport</a>,
-$<a href="postconf.5.html#sender_dependent_relayhost_maps">sender_dependent_relayhost_maps</a>, $<a href="postconf.5.html#relayhost">relayhost</a>, or from the recipient
-domain.
+<p> For recipient domains in the <a href="ADDRESS_CLASS_README.html#default_domain_class">default domain</a> class: <p>
+
+<ul>
+
+<li> <p> In order of decreasing precedence, the delivery transport
+is taken from 1) $<a href="postconf.5.html#transport_maps">transport_maps</a>, 2)
+$<a href="postconf.5.html#sender_dependent_default_transport_maps">sender_dependent_default_transport_maps</a> or $<a href="postconf.5.html#default_transport">default_transport</a>.
</p>
+<li> <p> In order of decreasing precedence, the nexthop destination
+is taken from 1) $<a href="postconf.5.html#transport_maps">transport_maps</a>, 2)
+$<a href="postconf.5.html#sender_dependent_default_transport_maps">sender_dependent_default_transport_maps</a> or $<a href="postconf.5.html#default_transport">default_transport</a>, 3)
+$<a href="postconf.5.html#sender_dependent_relayhost_maps">sender_dependent_relayhost_maps</a> or $<a href="postconf.5.html#relayhost">relayhost</a> or the recipient
+domain. </p>
+
+</ul>
+
<p>
Specify a string of the form <i>transport:nexthop</i>, where <i>transport</i>
is the name of a mail delivery transport defined in <a href="master.5.html">master.cf</a>.
<p> Note 2: address information may be enclosed inside <tt>[]</tt>,
but this form is not required here. </p>
-<p> When <a href="postconf.5.html#inet_interfaces">inet_interfaces</a> specifies just one IPv4 and/or IPv6 address
-that is not a loopback address, the Postfix SMTP client will use
-this address as the IP source address for outbound mail. Support
-for IPv6 is available in Postfix version 2.2 and later. </p>
+<p> When <a href="postconf.5.html#smtp_bind_address">smtp_bind_address</a> and/or <a href="postconf.5.html#smtp_bind_address6">smtp_bind_address6</a> are not
+specified, the <a href="postconf.5.html#inet_interfaces">inet_interfaces</a> setting may constrain the source IP
+address for an outbound SMTP or LMTP connection. </p>
-<p>
-On a multi-homed firewall with separate Postfix instances listening on the
-"inside" and "outside" interfaces, this can prevent each instance from
-being able to reach remote SMTP servers on the "other side" of the
-firewall. Setting
-<a href="postconf.5.html#smtp_bind_address">smtp_bind_address</a> to 0.0.0.0 avoids the potential problem for
-IPv4, and setting <a href="postconf.5.html#smtp_bind_address6">smtp_bind_address6</a> to :: solves the problem
-for IPv6. </p>
+<ul>
+
+<li> <p> When <a href="postconf.5.html#inet_interfaces">inet_interfaces</a> specifies one IPv4 address, and that
+is not a loopback address, the Postfix SMTP client uses that as the
+source address for outbound IPv4 connections. </p>
+
+<li> <p> Otherwise, the Postfix SMTP client does not constrain the
+source IPv4 address, and connects using a system-chosen source IPv4
+address. This includes the cases where <a href="postconf.5.html#inet_interfaces">inet_interfaces</a> is empty,
+where it specifies <b>all</b>, or where it contains no IPv4 address,
+one IPv4 address that is a loopback address, or multiple IPv4
+addresses. </p>
+
+<li> <p> The same reasoning as above applies to the IPv6 protocol,
+and to the Postfix LMTP client. To disable IPv4 or IPv6 support in
+the Postfix SMTP and LMTP client, use <a href="postconf.5.html#inet_protocols">inet_protocols</a>. </p>
+
+</ul>
+
+<p> A Postfix SMTP client may fail to reach some remote SMTP servers
+when the client source IP address is constrained explicitly with
+<a href="postconf.5.html#smtp_bind_address">smtp_bind_address</a> or <a href="postconf.5.html#smtp_bind_address6">smtp_bind_address6</a>, or implicitly with
+<a href="postconf.5.html#inet_interfaces">inet_interfaces</a>. This can happen when Postfix runs on a multi-homed
+system such as a firewall, the Postfix SMTP source client IP address
+is constrained to one specific network interface, and the remote
+SMTP server must be reached through a different interface. Setting
+<a href="postconf.5.html#smtp_bind_address">smtp_bind_address</a> to 0.0.0.0 avoids the potential problem for IPv4,
+and setting <a href="postconf.5.html#smtp_bind_address6">smtp_bind_address6</a> to :: solves the problem for IPv6.
+</p>
<p>
-A better solution for multi-homed
firewalls is to leave <a href="postconf.5.html#inet_interfaces">inet_interfaces</a>
+A better solution for multi-homed
systems is to leave <a href="postconf.5.html#inet_interfaces">inet_interfaces</a>
at the default value and instead use explicit IP addresses in
the <a href="master.5.html">master.cf</a> SMTP server definitions. This preserves the Postfix
SMTP client's
<p>
The default mail delivery transport and next-hop destination for
-remote delivery to domains listed with $<a href="postconf.5.html#relay_domains">relay_domains</a>. In order of
-decreasing precedence, the nexthop destination is taken from
-$<a href="postconf.5.html#relay_transport">relay_transport</a>, $<a href="postconf.5.html#sender_dependent_relayhost_maps">sender_dependent_relayhost_maps</a>, $<a href="postconf.5.html#relayhost">relayhost</a>, or
-from the recipient domain. This information can be overruled with
-the <a href="transport.5.html">transport(5)</a> table.
+the <a href="ADDRESS_CLASS_README.html#relay_domain_class">relay domain</a> address class: recipient domains that match
+$<a href="postconf.5.html#relay_domains">relay_domains</a>. </p>
+
+<p> For recipient domains in the <a href="ADDRESS_CLASS_README.html#relay_domain_class">relay domain</a> address class: </p>
+
+<ul>
+
+<li> <p> In order of decreasing precedence, the message delivery
+transport is taken from 1) $<a href="postconf.5.html#transport_maps">transport_maps</a>, 2) $<a href="postconf.5.html#relay_transport">relay_transport</a>.
</p>
+<li> <p> In order of decreasing precedence, the nexthop destination
+is taken from 1) $<a href="postconf.5.html#transport_maps">transport_maps</a>, 2) $<a href="postconf.5.html#relay_transport">relay_transport</a>, 3)
+$<a href="postconf.5.html#sender_dependent_relayhost_maps">sender_dependent_relayhost_maps</a> or $<a href="postconf.5.html#relayhost">relayhost</a> or the recipient
+domain. </p>
+
+</ul>
+
<p>
Specify a string of the form <i>transport:nexthop</i>, where <i>transport</i>
is the name of a mail delivery transport defined in <a href="master.5.html">master.cf</a>.
(default: empty)</b></DT><DD>
<p>
-The next-hop destination(s) for non-local mail; overrides non-local
-domains in recipient addresses. This information is overruled with
-<a href="postconf.5.html#relay_transport">relay_transport</a>, <a href="postconf.5.html#sender_dependent_default_transport_maps">sender_dependent_default_transport_maps</a>,
-<a href="postconf.5.html#default_transport">default_transport</a>, <a href="postconf.5.html#sender_dependent_relayhost_maps">sender_dependent_relayhost_maps</a>
-and with the <a href="transport.5.html">transport(5)</a> table.
+The next-hop destination(s) for non-local mail; takes precedence
+over non-<a href="ADDRESS_CLASS_README.html#local_domain_class">local domains</a> in recipient addresses. This information
+will not be used when the sender matches $<a href="postconf.5.html#sender_dependent_relayhost_maps">sender_dependent_relayhost_maps</a>.
</p>
+<p> In order of decreasing precedence: </p>
+
+<ul>
+
+<li> <p> For recipient domains in the <a href="ADDRESS_CLASS_README.html#relay_domain_class">relay domain</a> address class
+(domains matching $<a href="postconf.5.html#relay_domains">relay_domains</a>), the nexthop destination is taken
+from 1) $<a href="postconf.5.html#transport_maps">transport_maps</a>, 2) $<a href="postconf.5.html#relay_transport">relay_transport</a>, 3)
+$<a href="postconf.5.html#sender_dependent_relayhost_maps">sender_dependent_relayhost_maps</a> or $<a href="postconf.5.html#relayhost">relayhost</a> or the recipient
+domain. <p>
+
+<li> <p> For recipient domains in the <a href="ADDRESS_CLASS_README.html#default_domain_class">default domain</a> address class
+(domains that do not match $<a href="postconf.5.html#mydestination">mydestination</a>, $<a href="postconf.5.html#inet_interfaces">inet_interfaces</a>,
+$<a href="postconf.5.html#proxy_interfaces">proxy_interfaces</a>, $<a href="postconf.5.html#virtual_alias_domains">virtual_alias_domains</a>, $<a href="postconf.5.html#virtual_mailbox_domains">virtual_mailbox_domains</a>,
+or $<a href="postconf.5.html#relay_domains">relay_domains</a>), the nexthop destination is taken from 1)
+$<a href="postconf.5.html#transport_maps">transport_maps</a>, 2) $<a href="postconf.5.html#sender_dependent_default_transport_maps">sender_dependent_default_transport_maps</a> or
+$<a href="postconf.5.html#default_transport">default_transport</a>, 3) $<a href="postconf.5.html#sender_dependent_relayhost_maps">sender_dependent_relayhost_maps</a> or $<a href="postconf.5.html#relayhost">relayhost</a>
+or the recipient domain. </p>
+
+</ul>
+
<p>
On an intranet, specify the organizational domain name. If your
internal DNS uses no MX records, specify the name of the intranet
without overriding the global <a href="postconf.5.html#default_transport">default_transport</a> parameter setting.
This information is overruled with the <a href="transport.5.html">transport(5)</a> table. </p>
-<p>
-Specify zero or more "type:name" lookup tables, separated by
-whitespace or comma. Tables will be searched in the specified order
-until a match is found.
+<p> This setting affects only the <a href="ADDRESS_CLASS_README.html#default_domain_class">default domain</a> address class
+(recipient domains that do not match $<a href="postconf.5.html#mydestination">mydestination</a>, $<a href="postconf.5.html#inet_interfaces">inet_interfaces</a>,
+$<a href="postconf.5.html#proxy_interfaces">proxy_interfaces</a>, $<a href="postconf.5.html#virtual_alias_domains">virtual_alias_domains</a>, $<a href="postconf.5.html#virtual_mailbox_domains">virtual_mailbox_domains</a>,
+or $<a href="postconf.5.html#relay_domains">relay_domains</a>): </p>
+
+<ul>
+
+<li> <p> In order of decreasing precedence, the delivery transport
+is taken from 1) $<a href="postconf.5.html#transport_maps">transport_maps</a>, 2)
+$<a href="postconf.5.html#sender_dependent_default_transport_maps">sender_dependent_default_transport_maps</a> or $<a href="postconf.5.html#default_transport">default_transport</a>.
</p>
+<li> <p> In order of decreasing precedence, the nexthop destination
+is taken from 1) $<a href="postconf.5.html#transport_maps">transport_maps</a>, 2)
+$<a href="postconf.5.html#sender_dependent_default_transport_maps">sender_dependent_default_transport_maps</a> or $<a href="postconf.5.html#default_transport">default_transport</a>, 3)
+$<a href="postconf.5.html#sender_dependent_relayhost_maps">sender_dependent_relayhost_maps</a> or $<a href="postconf.5.html#relayhost">relayhost</a> or the recipient
+domain. </p>
+
+</ul>
+
<p> Note: this overrides <a href="postconf.5.html#default_transport">default_transport</a>, not <a href="postconf.5.html#transport_maps">transport_maps</a>, and
therefore the expected syntax is that of <a href="postconf.5.html#default_transport">default_transport</a>, not the
syntax of <a href="postconf.5.html#transport_maps">transport_maps</a>. Specifically, this does not support the
<a href="postconf.5.html#transport_maps">transport_maps</a> syntax for null transport, null nexthop, or null
email addresses. </p>
+<p>
+Specify zero or more "type:name" lookup tables, separated by
+whitespace or comma. Tables will be searched in the specified order
+until a match is found.
+</p>
+
<p> For safety reasons, this feature does not allow $number
substitutions in regular expression maps. </p>
setting. The tables are searched by the envelope sender address and
@domain. A lookup result of DUNNO terminates the search without
overriding the global <a href="postconf.5.html#relayhost">relayhost</a> parameter setting (Postfix 2.6 and
-later). This information is overruled with <a href="postconf.5.html#relay_transport">relay_transport</a>,
-<a href="postconf.5.html#sender_dependent_default_transport_maps">sender_dependent_default_transport_maps</a>, <a href="postconf.5.html#default_transport">default_transport</a> and with
-the <a href="transport.5.html">transport(5)</a> table. </p>
+later). </p>
+
+<p> In order of decreasing precedence: </p>
+
+<ul>
+
+<li> <p> For recipient domains in the <a href="ADDRESS_CLASS_README.html#relay_domain_class">relay domain</a> address class
+(domains matching $<a href="postconf.5.html#relay_domains">relay_domains</a>), the nexthop destination is taken
+from 1) $<a href="postconf.5.html#transport_maps">transport_maps</a>, 2) $<a href="postconf.5.html#relay_transport">relay_transport</a>, 3)
+$<a href="postconf.5.html#sender_dependent_relayhost_maps">sender_dependent_relayhost_maps</a> or $<a href="postconf.5.html#relayhost">relayhost</a> or the recipient
+domain. </p>
+
+<li> <p> For recipient domains in the <a href="ADDRESS_CLASS_README.html#default_domain_class">default domain</a> address class
+(domains that do not match <a href="postconf.5.html#mydestination">mydestination</a>, $<a href="postconf.5.html#inet_interfaces">inet_interfaces</a>,
+$<a href="postconf.5.html#proxy_interfaces">proxy_interfaces</a>, $<a href="postconf.5.html#virtual_alias_domains">virtual_alias_domains</a>, $<a href="postconf.5.html#virtual_mailbox_domains">virtual_mailbox_domains</a>,
+$<a href="postconf.5.html#relay_domains">relay_domains</a>), the nexthop destination is taken from 1)
+$<a href="postconf.5.html#transport_maps">transport_maps</a>, 2) $<a href="postconf.5.html#sender_dependent_default_transport_maps">sender_dependent_default_transport_maps</a> or
+$<a href="postconf.5.html#default_transport">default_transport</a>, 3) $<a href="postconf.5.html#sender_dependent_relayhost_maps">sender_dependent_relayhost_maps</a> or $<a href="postconf.5.html#relayhost">relayhost</a>
+or the recipient domain. </p>
+
+</ul>
<p>
Specify zero or more "type:name" lookup tables, separated by
<p>
Optional lookup tables with mappings from recipient address to
(message delivery transport, next-hop destination). See <a href="transport.5.html">transport(5)</a>
-for details.
+for syntax details.
+</p>
+
+<p> This information may override the message delivery transport
+and/or next-hop destination that are specified with $<a href="postconf.5.html#local_transport">local_transport</a>,
+$<a href="postconf.5.html#virtual_transport">virtual_transport</a>, $<a href="postconf.5.html#relay_transport">relay_transport</a>, $<a href="postconf.5.html#default_transport">default_transport</a>,
+$<a href="postconf.5.html#sender_dependent_relayhost_maps">sender_dependent_relayhost_maps</a>, $<a href="postconf.5.html#relayhost">relayhost</a>,
+$<a href="postconf.5.html#sender_dependent_default_transport_maps">sender_dependent_default_transport_maps</a>, or the recipient domain.
</p>
<p>
This feature is available in Postfix 2.4 and later.
.SH default_transport (default: smtp)
The default mail delivery transport and next\-hop destination for
-destinations that do not match $mydestination, $inet_interfaces,
+the default domain class: recipient domains that do not match
+$mydestination, $inet_interfaces,
$proxy_interfaces, $virtual_alias_domains, $virtual_mailbox_domains,
-or $relay_domains. This information can be overruled with the
-sender_dependent_default_transport_maps parameter and with the
-\fBtransport\fR(5) table.
+or $relay_domains. This information will not be used when
+sender_dependent_default_transport_maps returns a result, and may
+be overridden with the \fBtransport\fR(5) table.
.PP
-In order of decreasing precedence, the nexthop destination is taken
-from $sender_dependent_default_transport_maps, $default_transport,
-$sender_dependent_relayhost_maps, $relayhost, or from the recipient
+For recipient domains in the default domain class:
+.IP \(bu
+In order of decreasing precedence, the delivery transport
+is taken from 1) $transport_maps, 2)
+$sender_dependent_default_transport_maps or $default_transport.
+.IP \(bu
+In order of decreasing precedence, the nexthop destination
+is taken from 1) $transport_maps, 2)
+$sender_dependent_default_transport_maps or $default_transport, 3)
+$sender_dependent_relayhost_maps or $relayhost or the recipient
domain.
+.br
.PP
Specify a string of the form \fItransport:nexthop\fR, where \fItransport\fR
is the name of a mail delivery transport defined in master.cf.
Note 2: address information may be enclosed inside [],
but this form is not required here.
.PP
-When inet_interfaces specifies just one IPv4 and/or IPv6 address
-that is not a loopback address, the Postfix SMTP client will use
-this address as the IP source address for outbound mail. Support
-for IPv6 is available in Postfix version 2.2 and later.
+When smtp_bind_address and/or smtp_bind_address6 are not
+specified, the inet_interfaces setting may constrain the source IP
+address for an outbound SMTP or LMTP connection.
+.IP \(bu
+When inet_interfaces specifies one IPv4 address, and that
+is not a loopback address, the Postfix SMTP client uses that as the
+source address for outbound IPv4 connections.
+.IP \(bu
+Otherwise, the Postfix SMTP client does not constrain the
+source IPv4 address, and connects using a system\-chosen source IPv4
+address. This includes the cases where inet_interfaces is empty,
+where it specifies \fBall\fR, or where it contains no IPv4 address,
+one IPv4 address that is a loopback address, or multiple IPv4
+addresses.
+.IP \(bu
+The same reasoning as above applies to the IPv6 protocol,
+and to the Postfix LMTP client. To disable IPv4 or IPv6 support in
+the Postfix SMTP and LMTP client, use inet_protocols.
+.br
.PP
-On a multi\-homed firewall with separate Postfix instances listening on the
-"inside" and "outside" interfaces, this can prevent each instance from
-being able to reach remote SMTP servers on the "other side" of the
-firewall. Setting
-smtp_bind_address to 0.0.0.0 avoids the potential problem for
-IPv4, and setting smtp_bind_address6 to :: solves the problem
-for IPv6.
+A Postfix SMTP client may fail to reach some remote SMTP servers
+when the client source IP address is constrained explicitly with
+smtp_bind_address or smtp_bind_address6, or implicitly with
+inet_interfaces. This can happen when Postfix runs on a multi\-homed
+system such as a firewall, the Postfix SMTP source client IP address
+is constrained to one specific network interface, and the remote
+SMTP server must be reached through a different interface. Setting
+smtp_bind_address to 0.0.0.0 avoids the potential problem for IPv4,
+and setting smtp_bind_address6 to :: solves the problem for IPv6.
.PP
-A better solution for multi\-homed firewalls is to leave inet_interfaces
+A better solution for multi\-homed systems is to leave inet_interfaces
at the default value and instead use explicit IP addresses in
the master.cf SMTP server definitions. This preserves the Postfix
SMTP client's
This feature is available in Postfix 2.0 and later.
.SH relay_transport (default: relay)
The default mail delivery transport and next\-hop destination for
-remote delivery to domains listed with $relay_domains. In order of
-decreasing precedence, the nexthop destination is taken from
-$relay_transport, $sender_dependent_relayhost_maps, $relayhost, or
-from the recipient domain. This information can be overruled with
-the \fBtransport\fR(5) table.
+the relay domain address class: recipient domains that match
+$relay_domains.
+.PP
+For recipient domains in the relay domain address class:
+.IP \(bu
+In order of decreasing precedence, the message delivery
+transport is taken from 1) $transport_maps, 2) $relay_transport.
+.IP \(bu
+In order of decreasing precedence, the nexthop destination
+is taken from 1) $transport_maps, 2) $relay_transport, 3)
+$sender_dependent_relayhost_maps or $relayhost or the recipient
+domain.
+.br
.PP
Specify a string of the form \fItransport:nexthop\fR, where \fItransport\fR
is the name of a mail delivery transport defined in master.cf.
.PP
This feature is available in Postfix 2.0 and later.
.SH relayhost (default: empty)
-The next\-hop destination(s) for non\-local mail; overrides non\-local
-domains in recipient addresses. This information is overruled with
-relay_transport, sender_dependent_default_transport_maps,
-default_transport, sender_dependent_relayhost_maps
-and with the \fBtransport\fR(5) table.
+The next\-hop destination(s) for non\-local mail; takes precedence
+over non\-local domains in recipient addresses. This information
+will not be used when the sender matches $sender_dependent_relayhost_maps.
+.PP
+In order of decreasing precedence:
+.IP \(bu
+For recipient domains in the relay domain address class
+(domains matching $relay_domains), the nexthop destination is taken
+from 1) $transport_maps, 2) $relay_transport, 3)
+$sender_dependent_relayhost_maps or $relayhost or the recipient
+domain.
+.IP \(bu
+For recipient domains in the default domain address class
+(domains that do not match $mydestination, $inet_interfaces,
+$proxy_interfaces, $virtual_alias_domains, $virtual_mailbox_domains,
+or $relay_domains), the nexthop destination is taken from 1)
+$transport_maps, 2) $sender_dependent_default_transport_maps or
+$default_transport, 3) $sender_dependent_relayhost_maps or $relayhost
+or the recipient domain.
+.br
.PP
On an intranet, specify the organizational domain name. If your
internal DNS uses no MX records, specify the name of the intranet
without overriding the global default_transport parameter setting.
This information is overruled with the \fBtransport\fR(5) table.
.PP
-Specify zero or more "type:name" lookup tables, separated by
-whitespace or comma. Tables will be searched in the specified order
-until a match is found.
+This setting affects only the default domain address class
+(recipient domains that do not match $mydestination, $inet_interfaces,
+$proxy_interfaces, $virtual_alias_domains, $virtual_mailbox_domains,
+or $relay_domains):
+.IP \(bu
+In order of decreasing precedence, the delivery transport
+is taken from 1) $transport_maps, 2)
+$sender_dependent_default_transport_maps or $default_transport.
+.IP \(bu
+In order of decreasing precedence, the nexthop destination
+is taken from 1) $transport_maps, 2)
+$sender_dependent_default_transport_maps or $default_transport, 3)
+$sender_dependent_relayhost_maps or $relayhost or the recipient
+domain.
+.br
.PP
Note: this overrides default_transport, not transport_maps, and
therefore the expected syntax is that of default_transport, not the
transport_maps syntax for null transport, null nexthop, or null
email addresses.
.PP
+Specify zero or more "type:name" lookup tables, separated by
+whitespace or comma. Tables will be searched in the specified order
+until a match is found.
+.PP
For safety reasons, this feature does not allow $number
substitutions in regular expression maps.
.PP
setting. The tables are searched by the envelope sender address and
@domain. A lookup result of DUNNO terminates the search without
overriding the global relayhost parameter setting (Postfix 2.6 and
-later). This information is overruled with relay_transport,
-sender_dependent_default_transport_maps, default_transport and with
-the \fBtransport\fR(5) table.
+later).
+.PP
+In order of decreasing precedence:
+.IP \(bu
+For recipient domains in the relay domain address class
+(domains matching $relay_domains), the nexthop destination is taken
+from 1) $transport_maps, 2) $relay_transport, 3)
+$sender_dependent_relayhost_maps or $relayhost or the recipient
+domain.
+.IP \(bu
+For recipient domains in the default domain address class
+(domains that do not match mydestination, $inet_interfaces,
+$proxy_interfaces, $virtual_alias_domains, $virtual_mailbox_domains,
+$relay_domains), the nexthop destination is taken from 1)
+$transport_maps, 2) $sender_dependent_default_transport_maps or
+$default_transport, 3) $sender_dependent_relayhost_maps or $relayhost
+or the recipient domain.
+.br
.PP
Specify zero or more "type:name" lookup tables, separated by
whitespace or comma. Tables will be searched in the specified order
.SH transport_maps (default: empty)
Optional lookup tables with mappings from recipient address to
(message delivery transport, next\-hop destination). See \fBtransport\fR(5)
-for details.
+for syntax details.
+.PP
+This information may override the message delivery transport
+and/or next\-hop destination that are specified with $local_transport,
+$virtual_transport, $relay_transport, $default_transport,
+$sender_dependent_relayhost_maps, $relayhost,
+$sender_dependent_default_transport_maps, or the recipient domain.
.PP
Specify zero or more "type:table" lookup tables, separated by
whitespace or comma. Tables will be searched in the specified order
<ul>
-<li> <a href="#resolve"> Resolve address to destination </a>
-
-<li> <a href="#transport"> Mail transport switch </a>
+<li> <a href="#resolve"> Resolve address to (transport, next-hop destination) </a>
<li> <a href="#relocated"> Relocated users table </a>
<table border="1">
<tr> <th nowrap> Address manipulation </th> <th nowrap> Scope </th>
-<th> Daemon </th> <th nowrap> Global turn-on control </th> <th nowrap> Selective
-turn-off control </th> </tr>
+<th> Daemon </th> <th nowrap> Turn-on controls </th> <th nowrap>
+Turn-off controls </th> </tr>
<tr> <td> <a href="#standard"> Rewrite addresses to standard form</a>
</td> <td nowrap> all mail </td> <td> trivial-<br>rewrite(8) </td>
nowrap> all mail </td> <td> cleanup(8) </td> <td> virtual_alias_maps
</td> <td> receive_override_options </td> </tr>
-<tr> <td> <a href="#resolve"> Resolve address to destination </a>
-</td> <td nowrap> all mail </td> <td> trivial-<br>rewrite(8) </td>
-<td> none </td> <td> none </td> </tr>
-
-<tr> <td> <a href="#transport"> Mail transport switch</a> </td>
-<td nowrap> all mail </td> <td> trivial-<br>rewrite(8) </td> <td>
-transport_maps </td> <td> none </td> </tr>
+<tr> <td> <a href="#resolve"> Resolve address to (transport, next-hop
+destination) </a> </td> <td nowrap> all mail </td> <td>
+trivial-<br>rewrite(8) </td> <td> local_transport, virtual_transport,
+relay_transport, default_transport, relayhost,
+sender_dependent_relayhost_maps, sender_dependent_default_transport_maps
+</td> <td> content_filter </td> </tr>
<tr> <td> <a href="#relocated"> Relocated users table</a> </td>
<td nowrap> all mail </td> <td> trivial-<br>rewrite(8) </td> <td>
<ul>
-<li> <a href="#resolve"> Resolve address to destination </a>
-
-<li> <a href="#transport"> Mail transport switch</a>
+<li> <a href="#resolve"> Resolve address to (transport, next-hop
+destination) </a>
<li> <a href="#relocated"> Relocated users table</a>
step in more detail, with specific examples or with pointers to
documentation with examples. </p>
-<h3> <a name="resolve"> Resolve address to destination </a> </h3>
+<h3> <a name="resolve"> Resolve address to (transport, next-hop
+destination) </a> </h3>
<p> The Postfix qmgr(8) queue manager selects new mail from the
-incoming queue or old mail from the deferred queue, and asks the
-trivial-rewrite(8) address rewriting and resolving daemon where it
-should be delivered. </p>
+incoming queue or old mail from the deferred queue. First it
+looks for overrides: </p>
+
+<ul>
+
+<li> <p> The REDIRECT action in access(5), header_checks(5) or
+body_checks(5) overrides all recipients of the message, and overrides
+a content_filter setting, and FILTER action in access(5),
+header_checks(5) or body_checks(5). The REDIRECT action was implemented
+as a short-cut to retaliate for abuse. </p>
-<p> As of version 2.0, Postfix distinguishes four major address
-classes. Each class has its own list of domain names, and each
-class has its own default delivery method, as shown in the table
-below. See the ADDRESS_CLASS_README document for the fine details.
-Postfix versions before 2.0 only distinguish between local delivery
-and everything else. </p>
+<li> <p> A content_filter setting and FILTER action in access(5),
+header_checks(5) or body_checks(5) provide their own (transport,
+next-hop destination) information. This bypasses all the steps that
+are described in the remainder of this section. </p>
+
+</ul>
+
+<p> When there is no content filter override, the qmgr(8) queue
+manager asks the trivial-rewrite(8) address rewriting and resolving
+daemon for each recipient how to deliver it (which message delivery
+transport) and where to deliver it (what next-hop destination). </p>
+
+<p> As of version 2.0, Postfix distinguishes four major domain
+classes. Each class has its own list of recipient domain names, and
+each class has its own delivery method, as shown in the table below.
+See the ADDRESS_CLASS_README document for the fine details. Postfix
+versions before 2.0 only distinguish between local delivery and
+everything else. </p>
+
+<p> Note that the table does not match recipients against
+virtual_alias_domains. The reason is that all valid recipients in
+a virtual alias domain must be aliased to an address in a different
+domain. All other recipients in a virtual alias domain are by
+definition undeliverable, and do not need to be considered here.
+</p>
<blockquote>
<table border="1">
-<tr><th align="left">Destination domain list </th> <th
-align="left">Default delivery method </th> <th>Availability
-</th> </tr>
+<tr> <th align="left">Domain class</th> <th align="left">Recipient
+domain match </th> <th> Delivery method </th> <th>Availability </th>
+</tr>
-<tr><td>$mydestination, $inet_interfaces, $proxy_interfaces </td>
-<td>$local_transport </td> <td>Postfix 1.0</td></tr>
+<tr><td>Local</td> <td>mydestination, inet_interfaces, proxy_interfaces
+</td> <td>local_transport </td> <td>Postfix 1.0</td></tr>
-<tr><td>$virtual_mailbox_domains </td> <td>$virtual_transport </td>
-<td>Postfix 2.0</td> </tr>
+<tr><td>Virtual mailbox</td> <td>virtual_mailbox_domains </td>
+<td>virtual_transport </td> <td>Postfix 2.0</td> </tr>
-<tr><td>$relay_domains </td> <td>$relay_transport </td> <td>Postfix
-2.0</td> </tr>
+<tr><td>Relay</td> <td>relay_domains </td> <td>relay_transport
+</td> <td>Postfix 2.0</td> </tr>
-<tr><td>none </td> <td>$default_transport </td> <td>Postfix 1.0</td>
-</tr>
+<tr><td>Default</td><td> none </td> <td>default_transport </td>
+<td>Postfix 1.0</td> </tr>
</table>
</blockquote>
-<h3> <a name="transport"> Mail transport switch </a> </h3>
+<p> The delivery methods in the above table may include a next-hop
+destination in addition to a delivery transport. This may override
+the next-hop destination that is by default taken from the recipient
+domain. </p>
-<p> Once the trivial-rewrite(8) daemon has determined a default
-delivery method it searches the optional transport(5) table for
-information that overrides the message destination and/or delivery
-method. Typical use of the transport(5) table is to send mail to
-a system
-that is not connected to the Internet, or to use a special SMTP
-client configuration for destinations that have special requirements.
-See, for example, the STANDARD_CONFIGURATION_README and UUCP_README
-documents, and the examples in the transport(5) manual page. </p>
+<p> Over time, features have been added to override the above
+transport and/or next-hop destination information. The following
+table lists where a transport or next-hop destination may be taken
+from, depending on the recipient domain class. </p>
-<p> Transport table lookups are disabled by default. To enable,
-edit the transport_maps parameter in the main.cf file and specify
-one or more lookup tables, separated by whitespace or commas. </p>
+<blockquote>
-<p> Example: </p>
+<table border="1">
+
+<tr> <th>Domain class</th> <th>Transport sources (in order of
+descending precedence)</th> <th> Next hop sources (in order of
+descending precedence)</th> </tr>
+
+<tr> <td> Local </td> <td> transport_maps, local_transport</td>
+<td> transport_maps, local_transport, recipient domain</td> </tr>
+
+<tr> <td> Virtual mailbox </td> <td> transport_maps,
+virtual_transport</td> <td> transport_maps, virtual_transport,
+recipient domain</td> </tr>
+
+<tr> <td> Relay </td> <td> transport_maps, relay_transport</td>
+<td> transport_maps, relay_transport, sender_dependent_relayhost_maps,
+relayhost, recipient domain</td> </tr>
+
+<tr> <td> Default </td> <td> transport_maps,
+sender_dependent_default_transport_maps, default_transport</td>
+<td> transport_maps, sender_dependent_default_transport_maps,
+default_transport, sender_dependent_relayhost_maps, relayhost,
+recipient domain</td> </tr>
+
+</table>
-<blockquote>
-<pre>
-/etc/postfix/main.cf:
- transport_maps = hash:/etc/postfix/transport
-</pre>
</blockquote>
<h3> <a name="relocated"> Relocated users table </a> </h3>
<p>
The default mail delivery transport and next-hop destination for
-destinations that do not match $mydestination, $inet_interfaces,
+the default domain class: recipient domains that do not match
+$mydestination, $inet_interfaces,
$proxy_interfaces, $virtual_alias_domains, $virtual_mailbox_domains,
-or $relay_domains. This information can be overruled with the
-sender_dependent_default_transport_maps parameter and with the
-transport(5) table. </p>
+or $relay_domains. This information will not be used when
+sender_dependent_default_transport_maps returns a result, and may
+be overridden with the transport(5) table. </p>
-<p>
-In order of decreasing precedence, the nexthop destination is taken
-from $sender_dependent_default_transport_maps, $default_transport,
-$sender_dependent_relayhost_maps, $relayhost, or from the recipient
-domain.
+<p> For recipient domains in the default domain class: <p>
+
+<ul>
+
+<li> <p> In order of decreasing precedence, the delivery transport
+is taken from 1) $transport_maps, 2)
+$sender_dependent_default_transport_maps or $default_transport.
</p>
+<li> <p> In order of decreasing precedence, the nexthop destination
+is taken from 1) $transport_maps, 2)
+$sender_dependent_default_transport_maps or $default_transport, 3)
+$sender_dependent_relayhost_maps or $relayhost or the recipient
+domain. </p>
+
+</ul>
+
<p>
Specify a string of the form <i>transport:nexthop</i>, where <i>transport</i>
is the name of a mail delivery transport defined in master.cf.
<p> Note 2: address information may be enclosed inside <tt>[]</tt>,
but this form is not required here. </p>
-<p> When inet_interfaces specifies just one IPv4 and/or IPv6 address
-that is not a loopback address, the Postfix SMTP client will use
-this address as the IP source address for outbound mail. Support
-for IPv6 is available in Postfix version 2.2 and later. </p>
+<p> When smtp_bind_address and/or smtp_bind_address6 are not
+specified, the inet_interfaces setting may constrain the source IP
+address for an outbound SMTP or LMTP connection. </p>
-<p>
-On a multi-homed firewall with separate Postfix instances listening on the
-"inside" and "outside" interfaces, this can prevent each instance from
-being able to reach remote SMTP servers on the "other side" of the
-firewall. Setting
-smtp_bind_address to 0.0.0.0 avoids the potential problem for
-IPv4, and setting smtp_bind_address6 to :: solves the problem
-for IPv6. </p>
+<ul>
+
+<li> <p> When inet_interfaces specifies one IPv4 address, and that
+is not a loopback address, the Postfix SMTP client uses that as the
+source address for outbound IPv4 connections. </p>
+
+<li> <p> Otherwise, the Postfix SMTP client does not constrain the
+source IPv4 address, and connects using a system-chosen source IPv4
+address. This includes the cases where inet_interfaces is empty,
+where it specifies <b>all</b>, or where it contains no IPv4 address,
+one IPv4 address that is a loopback address, or multiple IPv4
+addresses. </p>
+
+<li> <p> The same reasoning as above applies to the IPv6 protocol,
+and to the Postfix LMTP client. To disable IPv4 or IPv6 support in
+the Postfix SMTP and LMTP client, use inet_protocols. </p>
+
+</ul>
+
+<p> A Postfix SMTP client may fail to reach some remote SMTP servers
+when the client source IP address is constrained explicitly with
+smtp_bind_address or smtp_bind_address6, or implicitly with
+inet_interfaces. This can happen when Postfix runs on a multi-homed
+system such as a firewall, the Postfix SMTP source client IP address
+is constrained to one specific network interface, and the remote
+SMTP server must be reached through a different interface. Setting
+smtp_bind_address to 0.0.0.0 avoids the potential problem for IPv4,
+and setting smtp_bind_address6 to :: solves the problem for IPv6.
+</p>
<p>
-A better solution for multi-homed firewalls is to leave inet_interfaces
+A better solution for multi-homed systems is to leave inet_interfaces
at the default value and instead use explicit IP addresses in
the master.cf SMTP server definitions. This preserves the Postfix
SMTP client's
%PARAM relayhost
<p>
-The next-hop destination(s) for non-local mail; overrides non-local
-domains in recipient addresses. This information is overruled with
-relay_transport, sender_dependent_default_transport_maps,
-default_transport, sender_dependent_relayhost_maps
-and with the transport(5) table.
+The next-hop destination(s) for non-local mail; takes precedence
+over non-local domains in recipient addresses. This information
+will not be used when the sender matches $sender_dependent_relayhost_maps.
</p>
+<p> In order of decreasing precedence: </p>
+
+<ul>
+
+<li> <p> For recipient domains in the relay domain address class
+(domains matching $relay_domains), the nexthop destination is taken
+from 1) $transport_maps, 2) $relay_transport, 3)
+$sender_dependent_relayhost_maps or $relayhost or the recipient
+domain. <p>
+
+<li> <p> For recipient domains in the default domain address class
+(domains that do not match $mydestination, $inet_interfaces,
+$proxy_interfaces, $virtual_alias_domains, $virtual_mailbox_domains,
+or $relay_domains), the nexthop destination is taken from 1)
+$transport_maps, 2) $sender_dependent_default_transport_maps or
+$default_transport, 3) $sender_dependent_relayhost_maps or $relayhost
+or the recipient domain. </p>
+
+</ul>
+
<p>
On an intranet, specify the organizational domain name. If your
internal DNS uses no MX records, specify the name of the intranet
<p>
Optional lookup tables with mappings from recipient address to
(message delivery transport, next-hop destination). See transport(5)
-for details.
+for syntax details.
+</p>
+
+<p> This information may override the message delivery transport
+and/or next-hop destination that are specified with $local_transport,
+$virtual_transport, $relay_transport, $default_transport,
+$sender_dependent_relayhost_maps, $relayhost,
+$sender_dependent_default_transport_maps, or the recipient domain.
</p>
<p>
<p>
The default mail delivery transport and next-hop destination for
-remote delivery to domains listed with $relay_domains. In order of
-decreasing precedence, the nexthop destination is taken from
-$relay_transport, $sender_dependent_relayhost_maps, $relayhost, or
-from the recipient domain. This information can be overruled with
-the transport(5) table.
+the relay domain address class: recipient domains that match
+$relay_domains. </p>
+
+<p> For recipient domains in the relay domain address class: </p>
+
+<ul>
+
+<li> <p> In order of decreasing precedence, the message delivery
+transport is taken from 1) $transport_maps, 2) $relay_transport.
</p>
+<li> <p> In order of decreasing precedence, the nexthop destination
+is taken from 1) $transport_maps, 2) $relay_transport, 3)
+$sender_dependent_relayhost_maps or $relayhost or the recipient
+domain. </p>
+
+</ul>
+
<p>
Specify a string of the form <i>transport:nexthop</i>, where <i>transport</i>
is the name of a mail delivery transport defined in master.cf.
setting. The tables are searched by the envelope sender address and
@domain. A lookup result of DUNNO terminates the search without
overriding the global relayhost parameter setting (Postfix 2.6 and
-later). This information is overruled with relay_transport,
-sender_dependent_default_transport_maps, default_transport and with
-the transport(5) table. </p>
+later). </p>
+
+<p> In order of decreasing precedence: </p>
+
+<ul>
+
+<li> <p> For recipient domains in the relay domain address class
+(domains matching $relay_domains), the nexthop destination is taken
+from 1) $transport_maps, 2) $relay_transport, 3)
+$sender_dependent_relayhost_maps or $relayhost or the recipient
+domain. </p>
+
+<li> <p> For recipient domains in the default domain address class
+(domains that do not match mydestination, $inet_interfaces,
+$proxy_interfaces, $virtual_alias_domains, $virtual_mailbox_domains,
+$relay_domains), the nexthop destination is taken from 1)
+$transport_maps, 2) $sender_dependent_default_transport_maps or
+$default_transport, 3) $sender_dependent_relayhost_maps or $relayhost
+or the recipient domain. </p>
+
+</ul>
+
<p>
Specify zero or more "type:name" lookup tables, separated by
without overriding the global default_transport parameter setting.
This information is overruled with the transport(5) table. </p>
-<p>
-Specify zero or more "type:name" lookup tables, separated by
-whitespace or comma. Tables will be searched in the specified order
-until a match is found.
+<p> This setting affects only the default domain address class
+(recipient domains that do not match $mydestination, $inet_interfaces,
+$proxy_interfaces, $virtual_alias_domains, $virtual_mailbox_domains,
+or $relay_domains): </p>
+
+<ul>
+
+<li> <p> In order of decreasing precedence, the delivery transport
+is taken from 1) $transport_maps, 2)
+$sender_dependent_default_transport_maps or $default_transport.
</p>
+<li> <p> In order of decreasing precedence, the nexthop destination
+is taken from 1) $transport_maps, 2)
+$sender_dependent_default_transport_maps or $default_transport, 3)
+$sender_dependent_relayhost_maps or $relayhost or the recipient
+domain. </p>
+
+</ul>
+
<p> Note: this overrides default_transport, not transport_maps, and
therefore the expected syntax is that of default_transport, not the
syntax of transport_maps. Specifically, this does not support the
transport_maps syntax for null transport, null nexthop, or null
email addresses. </p>
+<p>
+Specify zero or more "type:name" lookup tables, separated by
+whitespace or comma. Tables will be searched in the specified order
+until a match is found.
+</p>
+
<p> For safety reasons, this feature does not allow $number
substitutions in regular expression maps. </p>
* Patches change both the patchlevel and the release date. Snapshots have no
* patchlevel; they change the release date only.
*/
-#define MAIL_RELEASE_DATE "20230502"
+#define MAIL_RELEASE_DATE "20230504"
#define MAIL_VERSION_NUMBER "3.9"
#ifdef SNAPSHOT
projects / thirdparty / postfix.git / commitdiff
