Now I try to send mail to box and what happen:
Nov 18 17:12:35 netcup.silviosiefke.com postfix/smtpd[6215]: NOQUEUE:
reject: RCPT from unknown[81.91.160.182]: 450 4.7.25 Client host
rejected: cannot find your hostname, [81.91.160.182];
from=<maintenance-l-ow...@list.denic.de> to=<lis...@silvio-siefke.de>
proto=ESMTP helo=<list-2.denic.de>
This means that a reverse lookup of 81.91.160.182 on
netcup.silviosiefke.com fails. Log into netcup.silviosiefke.com, try "dig
-x 81.91.160.182", and see what happens.
My guess is that if you replace the contents of /etc/resolv.conf by:
nameserver 8.8.8.8
nameserver 8.8.4.4
your problem will likely be solved.
Gregory
