> Can anyone point me to some documentation on how to run sendmail so
> that it listens on another port other than port 25. Preferable I want
> it to listen on port 25 and another port. Is this possible?
INSTALLATION AND OPERATION GUIDE
[O] Set server SMTP options. The options are key=value pairs.
Known keys are:
Port Name/number of listening port (defaults to "smtp")
Addr Address mask (defaults INADDR_ANY)
Family Address family (defaults to INET)
Listen Size of listen queue (defaults to 10)
SndBufSize Size of TCP send buffer
RcvBufSize Size of TCP receive buffer
The Address mask may be a numeric address in dot notation or a
in your /etc/mail/sendmail.cf.