[166230] in North American Network Operators' Group
Re: comcast ipv6 PTR
daemon@ATHENA.MIT.EDU (Franck Martin)
Mon Oct 14 21:23:47 2013
From: Franck Martin <fmartin@linkedin.com>
To: Barry Shein <bzs@world.std.com>
Date: Tue, 15 Oct 2013 01:23:09 +0000
In-Reply-To: <21084.36579.320535.17928@world.std.com>
Cc: "<nanog@nanog.org>" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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If you want to block spam on IPv6, then you can start by rejecting =
connections to SMTP from any IPv6 that do not have a PTR. No need to =
analyze the format of the PTR.
It is in several recommendations that a sending email IP must have a =
PTR.
That ISPs will not do a PTR on all IPv6 but only on static IPv6, =
improves the spam blocking feature above. No need to maintain list of =
dynamic IP space...
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