[afnog] is my sendmail an open-relay?

[Brian Candler]

On Tue, Nov 07, 2006 at 07:50:51PM +0000, Colin Johnston wrote:
> In addition to testing, I would make a outgoing mail server on a different
> network non 25 port

There is an official port for this (587, for SMTP "mail submission"), but
it's not widely used. Its main benefit is to allow people to submit mail
using SMTP AUTH when the remote network has blocked outgoing port 25.