Mailing List CGatePro@mail.stalker.com Message #93575
From: Michael Katz <mkatz@messagepartners.com>
Subject: Re: Re: How to Reject bad HELO domain?
Date: Mon, 07 Jan 2008 09:10:10 -0500
To: CommuniGate Pro Discussions <CGatePro@mail.stalker.com>


Technical Support, Stalker Labs wrote:
<div class="moz-text-flowed" style="font-family: -moz-fixed">Hello,
 Kenneth Hayber on 31.12.2007 22:28 wrote:

Hi,

I want to be able to reject "failed to resolve HELO parameter" instances, but I cannot see how to do it.

I have enabled "Verify HELO and Return-Path", but I cannot see how to Reject based on failed verification.


Can someone point me in the right direction?

According to Internet standards you MUST NOT reject mails because of bogus HELO. So CommuniGate only records a notification about failed HELO check into the received message header. Note that client programs often use local IPs and machine names in HELOs so their verification will fail.

This is ignored by many antispam appliances and email servers as they do reject based on helo information.  It may be non-compliant, but it is pretty common functionality.


Thanks,

Ken




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Michael Katz
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