Mailing List CGatePro@mail.stalker.com Message #106206
From: Michael A. Wise <spiski@okean.com>
Subject: Problems with mail lists/aliases/group redirects to gmail users
Date: Fri, 7 Oct 2016 12:18:43 -0700
To: CommuniGate Pro Discussions <CGatePro@mail.stalker.com>

Is anybody else seeing frequent gmail rejections of mails redirected to gmail users?

I started noticing this about three weeks ago seeing log entries like:

11:21:22.799 4 SMTP-000037(gmail.com) rsp: 354  Go ahead hx4si17992894pac.303 - gsmtp
11:21:24.832 4 SMTP-000037(gmail.com) rsp: 421-4.7.0 [50.193.60.236 15] Our system has detected an unusual rate of
11:21:24.832 4 SMTP-000037(gmail.com) rsp: 421-4.7.0 unsolicited mail originating from your IP address. To protect our
11:21:24.832 4 SMTP-000037(gmail.com) rsp: 421-4.7.0 users from spam, mail sent from your IP address has been temporarily
11:21:24.832 4 SMTP-000037(gmail.com) rsp: 421-4.7.0 rate limited. Please visit
11:21:24.832 4 SMTP-000037(gmail.com) rsp: 421-4.7.0 https://support.google.com/mail/?p=UnsolicitedRateLimitError to
11:21:24.832 4 SMTP-000037(gmail.com) rsp: 421 4.7.0 review our Bulk Email Senders Guidelines. hx4si17992894pac.303 - gsmtp
11:21:24.832 3 SMTP-000037(gmail.com) [65250101] message body rejected, got:421 4.7.0 review our Bulk Email Senders Guidelines. hx4si17992894pac.303 - gsmtp


This even though the supposed "offending" server in question is my personal hobbyist server and sends an average on of maybe 50-60 emails to gmail users on a given day. This is the same pattern my server has had for years without problems to gmail.

I asked a Google engineer about this a few weeks ago. He suspected a bug in some new "aggressive anti-dkim replay rule" and filed a bug with gmail's spam team. The problem went away for a few weeks, but is now back with a vengeance.

I'm just wondering if anybody else is seeing this?

It's starting to look an awful like Yahoo's harsh DKIM implementation which permanently broke legions of mail lists and forwarders the world over.



--Mike
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