Mailing List Message #106423
From: Nicolas Hatier <>
Subject: Re: Detect Blacklisted by DNS Name
Date: Sat, 20 May 2017 11:59:04 -0400
To: CommuniGate Pro Discussions <>
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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