Mailing List Message #92706
From: Mark Boyce <>
Subject: Problem with verify return path?
Date: Mon, 24 Sep 2007 12:39:05 +0100
To: CommuniGate Pro Discussions <>
X-Mailer: Apple Mail (2.752.2)
Hi All,

Just spent a while tracking down this problem;

Emails from one particular domain were being rejected with;

11:49:06.09 1 SMTPI-50550([]) Return-Path 'A.User@somedomaincom' rejected: no DNS A-data returned
11:49:06.09 4 SMTPI-50550([]) rsp: 472 A.User@somedomaincom no DNS A-data returned

After checking their DNS I find that of their two MX's only one has an a record;

# host -t MX mail is handled by 10 mail is handled by 20

# host

# host has address

# host -t A
somedomain has address

Now okay I accept that their DNS is broken, but should CGP be rejecting the message as there is actually a valid route back?  It's just their first MX that is broken.

CGP Server Version 5.0.9 on Linux


Best Regards

Mark Boyce
Dark Origins Ltd
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