Dnia 31.03.2026 o godz. 12:28:10 Washington Odhiambo via mailop pisze: > One of my mailing lists is subject to a special problem: The first post > would get delivered to all list subscribers. Subsequent responses to that > post would fail to get delivered to almost ALL the subscribers with gmail > servers saying: > ``` > A message that you sent could not be delivered to one or more of its > recipients. This is a permanent error. The following address(es) failed: > > [email protected] > host alt1.gmail-smtp-in.l.google.com [192.178.213.26] > SMTP error from remote mail server after end of data: > 550-5.7.1 [62.169.28.150 12] Gmail has detected that this message > is likely > 550-5.7.1 unsolicited mail. To reduce the amount of spam sent to Gmail, > this > 550-5.7.1 message has been blocked. For more information, go to > 550 5.7.1 https://support.google.com/mail/?p=UnsolicitedMessageError > a640c23a62f3a-b9b20250abbsi318855766b.53 > - gsmtp > ```
This is just "Google doing Google things", many people here regularly see this rejection message from Google without any apparent reason (it has been mentioned multiple times on the list), and you pretty much can't do anything about it, except advising your users to not use Gmail. -- Regards, Jaroslaw Rafa [email protected] -- "In a million years, when kids go to school, they're gonna know: once there was a Hushpuppy, and she lived with her daddy in the Bathtub." _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
