Adrnalnrsh

Well-Known Member
Apr 6, 2005
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AZ

ljwhite

Well-Known Member
Jun 20, 2005
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How to check to see if our IP address is black listed by any of the SPAM watchdogs? I’ve had some strange emails rejected over the last few days and am concerned. But, don’t know how to check.
 

ljwhite

Well-Known Member
Jun 20, 2005
363
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166
Thanks for your help. I went to the url and input our server's ip address. After this, I saw one red line and one yellow line in the result.
Test Name Result Details TTL Time
(Red)PTR MISSING! our server's ip has no reverse DNS entry; 0 seconds 0 ms
some mail servers may not accept your mail.
(Yellow)KITHRUP DNS lookup error: SERVER FAILURE 0 ms

What is the problem? What shall i do?
 

ujr

Well-Known Member
Mar 19, 2004
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Typically it is best to have an rDNS entry for your mail server, or MTA's fqdn.

RFC 1912 (circa 1996) actually requires it. And, I may mention that SPF records actually rely on it. Without it SPF is virtually useless...

Anyway, I recommend that the reverse DNS entry (PTR Record) match the fqdn (A Record) for at least the MTA. This is best policy.
 

ljwhite

Well-Known Member
Jun 20, 2005
363
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166
Thanks for your help!
Is there a way that i can do it using whm? If so, how could i do?
 

ujr

Well-Known Member
Mar 19, 2004
290
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rDNS or reverse DNS should be set up by your DC/NOC.
You can't do it from WHM.

If you add these records, keep a usage log on which IPs have rDNS, so if you ever change, that you have those records removed or altered.