Re: [Dovecot] OT: DNS-Problem with Mailnglist-Server

[Henrik Larsson]

which leads to postfix complaining:

May 30 13:28:39 mail postfix/smtpd[25014]: NOQUEUE: reject_warning: 
RCPT
from unknown[193.210.130.67]: 450 4.7.1 Client host rejected: cannot
find your reverse hostname, [193.210.130.67];
from=<dovecot-boun...@dovecot.org> to=<ha...@hannsmattes.de> 
proto=ESMTP
helo=<dovecot.org>

If your are checking for reverse hostname and won't accept e-mails if 
this is not present you will reject a lot of legitimate mail.