Odd sendmail problem.

Carsten Aulbert carsten at welcomes-you.com
Tue May 22 15:22:51 UTC 2007

Scott Lockwood wrote:
> I've got sendmail installed from the repository, but it refuses to
> listen on an outside interface. Everything seems to work fine from
> localhost, netstat -a shows that the system is listening, but I can't
> connect from the outside at all to the machine, from anywhere. Anyone
> have any ideas where to start looking?

My steps would be
(1) look at netstat if process is listening on that port and the IP of
that interface (done according to your email)
(2) try to connect via telnet
telnet IP 25
 (a) if that works I would try to send an email interactively, however,
I would have to look up a SMTP cheat sheet :)
(3) if doesn't work, I would look at a possible iptables rules stopping this
(4) or at some "hardware" firewall between the client and your server.

Apart from that, hard to tell from the distance.



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