Jan P. Kessler:
> > > Sep 12 04:57:06 nudin1 postfix/smtp[29110]: connect to
> > > freenet.de[62.104.23.42]:25: Connection refused
> >
> > connection refused is a network problem, probably a firewall block.
> > Perhaps your ISP doesn't allow you to run a mail server?
>
> Something is wrong with your DNS resolution. freenet.de[62.104.23.42] is
> not the correct MX for @freenet.de:
Well spotted. Apparently he uses A lookup instead of MX lookup.
This is a definite no-no for email.
% dig a freenet.de
...
freenet.de. 300 IN A 62.104.23.42
Wietse
