[afnog] is my sendmail an open-relay?

[Andy Davidson]

On 7 Nov 2006, at 20:14, Brian Candler 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.

Running a private (and locked down) smtp server on tcp/80 may well  
get you round even more firewalls.. Running a private OpenVPN system  
on tcp/80 may well be even more useful.

Cheers
-a