Reverse DNS failed on mxtoolbox
Posted on 2009-03-30
We just got a new IP from the ISP since we switched to a T1 line and I ran a test using mxtoolbox.com on our mail server and I got a rev dns failed. What is this? IP to domain name? How can i fix this or does it need to be fixed?
Banner: 220 barracuda.woodlandsprep.org ESMTP (69e64d74d20ea39f808266de067fe9e8)
Connect Time: 0 seconds - Good
Transaction Time: 0.094 seconds - Good
Relay Check: OK - This server is not an open relay.
Rev DNS Check: Reverse DNS FAILED! This is a problem.
GeoCode Info: Geocoding server is unavailable
Session Transcript: HELO please-read-policy.mxtoolbox.com
250 barracuda.woodlandsprep.org Hello mxtb-pws1.mxtoolbox.com [126.96.36.199], pleased to meet y [16 ms]
MAIL FROM: <email@example.com>
250 [16 ms]
RCPT TO: <firstname.lastname@example.org>
550 No such domain at this location (email@example.com [62 ms]
221 B [0 ms]