Mailing List Message #103339
From: Tom Rymes <>
Subject: Re: Senderbase / HELO issue
Date: Thu, 21 Jun 2012 12:34:46 -0400
To: CommuniGate Pro Discussions <>
On 06/20/2012 3:28 PM, Robert M. Opalko wrote:

To this end, some of the HELO strings we are seeing  ""
which is not exact matches to the PTR of the IP (


Your problem here is that your mailserver presents itself as "" and the reverse DNS is "". You have two options:

1.) Tell the server to present itself as "". Someone else has already posted up instructions on how to do that.
2.) Change the reverse DNS to "" to match the mail server. Of course, if is a different IP address, this is not a valid option.

It seems that mxtoolbox reports back as "OK" if the two don't match identically, but Senderbase is more of a stickler about this, requiring the two to match exactly.

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