[185952] in North American Network Operators' Group
Re: AOL postmaster rejections.
daemon@ATHENA.MIT.EDU (John Peach)
Thu Nov 19 14:53:11 2015
X-Original-To: nanog@nanog.org
Date: Thu, 19 Nov 2015 14:52:50 -0500
From: John Peach <john-nanog@peachfamily.net>
To: nanog@nanog.org
In-reply-to: <564E2349.5060901@ispn.net>
Reply-To: nanog@nanog.org
Errors-To: nanog-bounces@nanog.org
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On Thu, 19 Nov 2015 13:30:17 -0600
Blake Hudson <blake@ispn.net> wrote:
>=20
>=20
> John Peach wrote on 11/19/2015 8:08 AM:
> > Has anyone else with relatively large volumes of email seen a huge
> > spike in rejections from AOL recently?
> Yes.
>=20
> > There is no obvious reason why they are being rejected as it is a
> > generic message:
> >
> > Nov 18 12:10:39 pp-serve02 sendmail[1391]: tAIHAcPT001383:
> > mailin-04.mx.aol.com.: SMTP DATA-2 protocol error: 521 5.2.1 : AOL
> > will not accept delivery of this message.
> >
> > Looking back through my logs, I can see we've always had a few, but
> > we are now receiving a lot of complaints from users (physicians who
> > cannot email their patients) and I see this, starting on Monday:
> >
> > syslog-2015-11-16
> > 588
> > syslog-2015-11-17
> > 1668
> > syslog-2015-11-18
> > 1937
> >
> > and I already have 55 for today.
> Same; started this week. Only appears to affect one of our servers.
Now that is interesting; I hadn't though to check that, but it is
affecting 3 out of our 4 and they are all in the same subnet.
>=20
> Rejected messages by date:
> 2015-11-15
> 9
> 2015-11-15
> 4
> 2015-11-16
> 400
> 2015-11-17
> 710
> 2015-11-18
> 683
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> >
> > We have a whitelist / feedback loop set up with AOL, our IPs show
> > clean with them and our DNS / reverse DNS has not changed and
> > resolves properly.
> Same here
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> >
> > We did raise a ticket with them, but it seems to have gone to the
> > usual /dev/null.
> Same here. I'm recommending AOL customers contact AOL for support.
>=20
> >
> > To reply off-list, please remove the VERP -nanog from my email
> > address,
>=20
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