[151427] in North American Network Operators' Group
Re: Microsoft/Hotmail forgot to set reverse DNS pointers?
daemon@ATHENA.MIT.EDU (D. Ryan Spott)
Wed Mar 21 12:40:41 2012
In-Reply-To: <4F69975C.3060001@klaver.it>
From: "D. Ryan Spott" <rspott@irongoat.net>
Date: Wed, 21 Mar 2012 09:38:52 -0700
To: Michiel Klaver <michiel@klaver.it>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Mocalert@Microsoft.com
Mention Sev1 in your email.=20
ryan
On Mar 21, 2012, at 1:54 AM, Michiel Klaver <michiel@klaver.it> wrote:
> Today I received some notices about Hotmail users who couldn't send e-mail=
> messages to various receipients due to spamfilters blocking them at the
> receiving mailservers. Seems like Microsoft/Hotmail staff forgot to set so=
me
> reverse DNS pointer records:
>=20
> Diagnostic-Code: smtp;450 4.7.1 Client host rejected: cannot find your
> reverse hostname, [157.55.1.150]
>=20
> (Verified this using various public DNS servers, to exclude potential loca=
l
> issues)
>=20
> Anyone here who has proper contacts to give them the clue-bat?
>=20
>=20
> --
> Michiel Klaver
> IT Professional
>=20
