Mailing List Message #106424
From: Gib Henry <>
Subject: Re: Detect Blacklisted by DNS Name
Date: Sat, 20 May 2017 12:59:56 -0500
To: CommuniGate Pro Discussions <>

Wow, thanks!  That’s certainly not obvious.  I had always assumed that the  line “Received: from ([] verified)” meant that CGP had verified that really was  Not so, apparently.  Seems counter-intuitive.  Cheers,
Gib Henry

On 5/20/17 10:59 AM, Nicolas Hatier wrote:
The blacklist by DNS name does a PTR request on the IP address.

While has an A record pointing to, does not have a PTR record pointing to

Nicolas Hatier, ing. <>
Niversoft idées logicielles -

On 2017-05-20 10:55, Gib Henry wrote:

I am currently set to block all traffic originating from the top-level domain .vip:

However, that appears to fail, because this message came through:

Return-Path: <>
Received: from ([] verified) by…

I see rejections from, so I know the detection can work.  What am I missing in this case?  Can I not block an entire top-level domain?  Cheers,
Gib Henry

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