Hi
Recently I had some complains about the ammount of SPAM received.
After some searches I found this page:
https://www.linuxbabe.com/mail-server/configure-postscreen-in-postfix-to-block-spambots
Since it looked like a good idea I decided to give it a try
when I enabled postscreen in the server I did a test sending a email to
see if things where working
the logs showed that the smtp process was not resolving domains
postfix/smtpd[14919]: NOQUEUE: reject: RCPT from unknown[209.85.128.45]:
450 4.1.8 <****@gmail.com>: Sender address rejected: Domain not found;
from=<*****@gmail.com> to=<*******> proto=ESMTP
helo=<mail-wm1-f45.google.com>
When I deactivated postscreen everything went back to normal.
Now the question:
In the page that I mentioned earlier there is a note about CentOS 7 (the
distribution that I am using) that tells to
mkdir /var/spool/postfix/lib64
cp -vl /usr/lib64/libnss_* /var/spool/postfix/lib64
in adition to that I also copied libresolv
and the dns resolving failure persisted.
Am I missing something? I did some searches in google and didn't found
anything relevant, since CentOS 7 is very used maybe somebody can point
me in the right direction.
Thanks
