Reverse DNS does not match SMTP Banner
Posted: Tue Apr 27, 2010 4:33 am
I've just installed MagicSpam 1.04.61 on my CentOS 5 Plesk 9.3 server running QMail.
When I use http://www.mxtoolbox.com to check one of the domain names, I get:
Normally, I would expect the reverse DNS to be in place. For example, on another RHEL 5 Plesk 9.3 running Postfix with MagicSpam 1.04.61 I get the following output from mxtoolbox:
Where am I going wrong? I've set the hostname property on both servers in Plesk's settings section.
When I use http://www.mxtoolbox.com to check one of the domain names, I get:
Code: Select all
220 Spam Protection provided by MagicSpam www.magicspam.com ESMTP
Not an open relay.
0 seconds - Good on Connection time
0.468 seconds - Good on Transaction time
OK - 78.***.***.** resolves to
Warning - Reverse DNS does not match SMTP Banner
Code: Select all
20 server1.***************.com ESMTP Postfix
Not an open relay.
0 seconds - Good on Connection time
0.530 seconds - Good on Transaction time
OK - 83.***.***.** resolves to server1.**************.com
OK - Reverse DNS matches SMTP Banner