I think you might be confusing ports with interfaces. Each
	interface (physical or virtual) will typically have an address for
	each protocol used. Within tcp/ip there is the concept of 'ports',
	which can be from 1 to 65536 (I believe). Standard services live
	on well defined ports (see /etc/services). So when one machine
	sends email to another it knows to connect to an interface on
	port 25 (smtp). Similarly when you telnet in in knows to use port
	23. The receiving machine will have a process listening on each
	relevant port, plus 'inetd.conf' which acts as a type of telephone
	operator - it listens on many ports and fires up a given program
	for each port on demand.

	As to the original question - check /usr/share/sendmail/README -
	I think DaemonPortOptions _might_ be what you are looking for.

		David/absolute

                      Neighbours should be one of:
                a) Understanding   b) Distant   c) Deaf

On Sun, 17 Jan 1999, KITAMURA Yasuichi wrote:

> >         Can sendmail/smtp be set to listen to another port? If so, how?
> >         Can it listen to one port for external mail and another for LAN mail?
> >         Anybody ever tried this?
> 
> I'm not sure what you mean. But, if all the port is active, sendmail works f
> or every port.
> 
> In my case, sendmail 8.9.1 is working on SE/30. It has 2 active ports. One i
> s for ppp connected with ISP and another is the Ethernet. The SE/30 can reci
> eve e-mails from both ports. And also e-mails from the inside(Ethernet) can
> transit the SE/30  and have a direct SMTP link with outside machines.
> 
> 
> --KITAMURA
> 
>