[116171] in North American Network Operators' Group
Re: questionable email filtering policies?
daemon@ATHENA.MIT.EDU (Florian Weimer)
Fri Jul 24 09:40:05 2009
To: Chris Hills <chaz@chaz6.com>
From: Florian Weimer <fweimer@bfk.de>
Date: Fri, 24 Jul 2009 13:39:15 +0000
In-Reply-To: <h4cctv$fqt$1@ger.gmane.org> (Chris Hills's message of "Fri\,
24 Jul 2009 15\:28\:31 +0200")
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
* Chris Hills:
> On the topic of mail rejection I have come across a few sites that
> reject mail, even to postmaster@, from domains that have one or more
> ipv6-only MX records listed (i.e. a domain name with AAAA but no A
> record(s)). The common factor seems to be mimedefang.
Plain sendmail has got a similar issue, especially if the best MX is
IPv6-only. I learnt that the hard way---and it speaks for the quality
of IPv6 testing that the "IPv6 considerations for SMTP" RFC (forgot
its number) doesn't even come close to mentioning this issue,
preferring to talk about bizarre reachability concerns. 8-P
--=20
Florian Weimer <fweimer@bfk.de>
BFK edv-consulting GmbH http://www.bfk.de/
Kriegsstra=DFe 100 tel: +49-721-96201-1
D-76133 Karlsruhe fax: +49-721-96201-99
