The value can be either a
services string (suchas smtp) or a number (suchas 25). This key is useful inside domains
that are protected by a firewall. By specifying a nonstandard port, the firewall can communicate
in a more secure manner with the internal network while still accepting mail on the
normal port from the outside world:
O DaemonPortOptions=Port=26
If this pair is missing, the port defaults to smtp.
As of V8.10, sendmail now also obeys RFC2476 and (by default) listens on port 587 for the
local submission of mail (see ?§17.8.35 on page 635).
The value of Port (port number) is placed into the ${daemon_port} macro (?§21.9.36 on page
819) whenever rule sets are processed by that invocation of the daemon. For the
ClientPortOptions option, the value of Port (port number) is placed into the ${client_
port} macro whenever the client connects to another host.
Note that for the ClientPortOptions option, this Port probably should be set because it
limits outbound connections to one per IP address (because ports cannot be shared).
24.9.27.10 DaemonPortOptions=queueLA= (8.14 and later)
The queueLA key is used to specify a load average at which sendmail will begin to queue all
inbound email. This setting overrides the setting for the QueueLA option (?§24.9.91 on page
1072). See also the DaemonPortOptions option??™s delayLA (?§24.
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