I am running a fresh installation of Plesk 10.4.4 Update#12 on my Debian 6.0 server. So far, Postfix works without any problems. However, when I enable DNS blacklisting in the server-wide Mail settings and specify an entry as follows: zen.spamhaus.org
sending Mail via Postfix and authenticated relaying always fails, with the Mail client stating that sending the message was not possible. On the server, this always creates a new entry in the /var/log/mail.err file which looks like this:
Jan 23 20:57:44 server /usr/lib/plesk-9.0/psa-pc-remote: Message aborted.
I've tried restarting the server several times, but with no success. However, disabling DNSBL filtering fixed the problem immediately. Please, can someone here give me any instructions on how to solve this problem and still use DNS blacklisting?
Thanks a lot for any advice!