will deliver all mails to this port, regardless of whether a smarthost is set
or not.
.It Ic ALIASES Xo
-(string, default=/etc/mail/aliases)
+(string, default=/etc/aliases)
.Xc
Path to the local aliases file.
Just stick with the default.
.It Ic SECURETRANS Xo
(boolean, default=commented)
.Xc
-Comment if you want TLS/SSL secured transfer.
+Uncomment if you want TLS/SSL secured transfer.
.It Ic STARTTLS Xo
(boolean, default=commented)
.Xc
-Comment if you want to use STARTTLS.
+Uncomment if you want to use STARTTLS.
Only useful together with
.Sq SECURETRANS .
+.It Ic OPPORTUNISTIC_TLS Xo
+(boolean, default=commented)
+.Xc
+Uncomment if you want to allow the STARTTLS negotiation to fail.
+Most useful when
+.Nm
+is used without a smarthost, delivering remote messages directly to
+the outside mail exchangers; in opportunistic TLS mode, the connection will
+be encrypted if the remote server supports STARTTLS, but an unencrypted
+delivery will still be made if the negotiation fails.
+Only useful together with
+.Sq SECURETRANS
+and
+.Sq STARTTLS .
.It Ic CERTFILE Xo
(string, default=empty)
.Xc
.It Ic SECURE Xo
(boolean, default=commented)
.Xc
-Change this entry to
+Uncomment this entry and change it to
.Sq INSECURE
to use plain text SMTP login over an insecure connection.
You have to rename this variable manually to prevent that you send your
.It Ic DEFER Xo
(boolean, default=commented)
.Xc
-Comment if you want that
+Uncomment if you want that
.Nm
defers your mail.
You have to flush your mail queue manually with the
.It Ic MAILNAME Xo
(string, default=empty)
.Xc
-The name to be used when introducing this host, if different from
-the result of
-.Xr hostname 1 .
-If specified, this option overrides
-.Sq MAILNAMEFILE .
-.It Ic MAILNAMEFILE Xo
-(string, default=empty)
-.Xc
-The name of the file to read the
+The internet hostname
+.Nm
+uses to identify the host.
+If not set or empty, the result of
+.Xr gethostname 2
+is used.
+If
.Sq MAILNAME
-from.
+is an absolute path to a file, the first line of this file will be used
+as the hostname.
.El
.Ss Environment variables
The behavior of