# possible to specify multiple addresses. "*" listens in all IPv4 interfaces.
# "[::]" listens in all IPv6 interfaces, but may also listen in all IPv4
# interfaces depending on the operating system. You can specify ports with
-# "host:port".
+# "host:port", although with multiple protocols you probably want to move this
+# setting inside protocol imap/pop3 { ... } section, so you can specify
+# different ports for IMAP/POP3.
#listen = *
# IP or host address where to listen in for SSL connections. Defaults