On 5/8/23 21:35, Lars Bjørndal wrote:
Does someone have tips in how to solve the problem? Look at the log: mai 09 06:16:52 dalen.lamasti.net postfix/smtp[2174424]: 8163214C1740: to=<example@gmail.com>, relay=alt1.gmail-smtp-in.l.google.com[142.250.157.27]:25, delay=50885, delays=50875/0.04/6.5/3.7, dsn=4.7.28, status=deferred (host alt1.gmail-smtp-in.l.google.com[142.250.157.27] said: 421-4.7.28 [185.181.61.11 15] Our system has detected an unusual rate of 421-4.7.28 unsolicited mail originating from your IP address. To protect our 421-4.7.28 users from spam, mail sent from your IP address has been temporarily 421-4.7.28 rate limited. Please visit 421-4.7.28 https://support.google.com/mail/?p=UnsolicitedRateLimitError to 421 4.7.28 review our Bulk Email Senders Guidelines. 14-20020a63184e000000b00519f8ebcc5esi643336pgy.121 - gsmtp (in reply to end of DATA command))
First of all, that's just throttling/greylisting/whatever. It's a temp fail and your MTA should retry and the mail should ultimately be accepted.
Was your server sending an unusual amount of mail to google users, perhaps an unusually large amount of traffic on a list?
I'm only guessing, but I suspect this problem may go away after google gets more experience with your mail, but in any case, it should only result in delayed mail delivery.
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