On Thu, 19 Nov 2015 13:30:17 -0600 Blake Hudson <bl...@ispn.net> wrote:
> > > 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. > > > 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. > > Rejected messages by date: > 2015-11-15 > 9 > 2015-11-15 > 4 > 2015-11-16 > 400 > 2015-11-17 > 710 > 2015-11-18 > 683 > > > > > 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 > > > > > 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. > > > > > To reply off-list, please remove the VERP -nanog from my email > > address, >
signature.asc
Description: PGP signature