tickets #158535
Updated by crameleon about 1 month ago
Hundreds of emails are being stalled with messages such as the following: ``` (host alt1.gmail-smtp-in.l.google.com[2a00:1450:4010:c1c::1a] said: 421-4.7.28 Gmail has detected this message exceeded its quota for sending 421-4.7.28 messages with the same Message-ID. To best protect our users, the 421-4.7.28 message has been temporarily rejected. For more information, go to 421 4.7.28 https://support.google.com/mail/answer/188131 a12-20020a05651c010c00b002d8628654d4si436828ljb.544 - gsmtp (in reply to end of DATA command)) ``` The link does not reveal any _recent_ changes to their policy, we already use outbound TLS if supported by the destination server. Difficulties with sending to Google have been a problem for a long time (https://progress.opensuse.org/issues/109025) due to us not offering a "full fledged" email setup, though I do not recall such a large queue. My speculation is that maybe the issue increased with @suse.com @google.com switching to Google, since some SUSE employees might be subscribed to openSUSE mailing lists using their @suse.com address. Another issue could be the "recent" increase in spam.