On Tue, 21 Nov 2023 at 12:54, Ralf Hildebrandt via mailop <mailop@mailop.org> wrote: > We're running the postfix-users ML on list.sys4.de, and all over a > sudden we're being tempfailed by GMAIL:
I saw something similar happening on a couple of my IPs recently. I thought Google is slowly applying more restrictive rules/enforcement: in my case the block persisted for few hours each time. What's your abuse rate on the Postmaster Tools? Maybe this is related to an abuse rate over 0.3%: https://support.google.com/mail/answer/81126?visit_id=638361648208381724-1833007315&p=UnsolicitedRateLimitError&rd=1#spam-rate&zippy=%2Crequirements-for-sending-or-more-messages-per-day ----- Spam rate - Regularly monitor your domain's spam rate in Postmaster Tools. - Aim to keep your spam rate below 0.10%. - Avoid a spam rate of 0.30% or higher, especially for any sustained period of time. ----- > 421-4.7.28 Gmail has detected an unusual rate of unsolicited mail. To protect > 421-4.7.28 our users from spam, mail has been temporarily rate limited. Please > 421-4.7.28 visit > 421-4.7.28 https://support.google.com/mail/?p=UnsolicitedRateLimitError to > 421 4.7.28 review our Bulk Email Senders Guidelines. > s8-20020adfea88000000b0032fba209e8esi6123538wrm.543 - gsmtp (in reply to end > of DATA command) > > SPF, DKIM, DMARC, douoble-opt-in, valid forward and reverse DNS > records are all in place, and it's been working ok for quite some time > -- so it's a bit unclear what has changed here or what caused the > block... > > And since it's the postfix-users mailinglist, we're dead sure it's not > spam we're sending! Check in the Postmaster Tools as, even if it's hard to accept/believe, people report as abusive even emails with tickets they just bought on some online store. Stefano _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
