I don't have a Mailman recommendation, but the situation is worth some comment:
Notice Gmail "blocks" with a 4xx temp fail, for a message they will never accept. That's a protocol violation. It's abusive. I've been seeing the same temp fail abuse for some messages received from Mailchimp and forwarded by our users to external addresses, and also a message from princeton.edu forwarded through us to gmail. The fake temp fails clutter up the mail queue and slow down queue runs. To cope, I've started a separate queue runner to bounce on a short timeout for recipients @gmail. The 800 pound gorilla makes up its own rules. On Tue, Sep 11, 2018 at 10:10 PM Bernie Cosell <ber...@fantasyfarm.com> wrote: > I've gotten buried by 80 bounce messages, thanks to gmail's new policy > [that was, > apparently, put into effect yesterday]. The bounces say: > > <....@gmail.com>: host alt1.gmail-smtp-in.l.google.com[74.125.129.26] > said: > 421-4.7.0 This message does not have authentication information or > fails to > pass 421-4.7.0 authentication checks. To best protect our users from > spam, > the 421-4.7.0 message has been blocked. Please visit 421-4.7.0 > https://support.google.com/mail/answer/81126#authentication for more > 421- 4.7.0 information. 128-v6si11952705iti.109 - gsmtp (in reply to end of > DATA command) > > I looked at their 'answer' and mostly found it to be unhelpful. i > certainly can't get > any server anywhere to change their their system configuration, nor can I > mess > with mailman [all suggestions about python-esque tweaks to mailman presume > that you have access to the server, which I don't]. Is there something I > can do > [just as a list owner] to deal with this mess? > > /Bernie\_ > > > Bernie Cosell > ber...@fantasyfarm.com > -- Too many people; too few sheep -- > > ------------------------------------------------------ > Mailman-Users mailing list Mailman-Users@python.org > https://mail.python.org/mailman/listinfo/mailman-users > Mailman FAQ: http://wiki.list.org/x/AgA3 > Security Policy: http://wiki.list.org/x/QIA9 > Searchable Archives: > http://www.mail-archive.com/mailman-users%40python.org/ > Unsubscribe: > https://mail.python.org/mailman/options/mailman-users/brennan%40columbia.edu > -- Joseph Brennan Lead, Email and Systems Applications ------------------------------------------------------ Mailman-Users mailing list Mailman-Users@python.org https://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://wiki.list.org/x/AgA3 Security Policy: http://wiki.list.org/x/QIA9 Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ Unsubscribe: https://mail.python.org/mailman/options/mailman-users/archive%40jab.org