We're seeing the same issue since 28th March. Looks like their new reputation system needs some fine tuning by a big hammer :-) Maybe they bought the same reputation system as 1&1 did not long ago.
> 451 4.2.0 sc965: IP reputation ratelimit in effect On 3/28/21 4:16 PM, Silvan M. Gebhardt wrote: > Yup, seen the same! > > with a shared hosting server which is not on a blacklist at all. > > Silvan > > ----- Ursprüngliche Mail ----- > Von: "Peter Rohrer" <[email protected]> > An: "swinog" <[email protected]> > Gesendet: Sonntag, 28. März 2021 08:40:41 > Betreff: [swinog] Mail rejection at bluewin > > Hello everybody > > Since yesterday, we see a lot of bounced messages to bluewin addresses with > SMTP code 554, for example: > relay=mxbw-bluewin-ch.hdb-cs04.ellb.ch[195.186.227.50]:25, delay=0.16, > delays=0/0.01/0.09/0.05, dsn=5.2.0, status=bounced (host > mxbw-bluewin-ch.hdb-cs04.ellb.ch[195.186.227.50] said: 554 5.2.0 sc976: > Rejected due to policy reasons - > https://support.bluewin.ch/provider/bounce/XXXXXXXXXXXXXXXXX[redacted]== (in > reply to end of DATA command)) > Unfortunately, sc976 is not documented on > https://postmaster.bluewin.ch/content/de/technical-details/ > We can't see any general pattern behind those rejections (hosts trough our > entire IP range are affected), switching to a different IP address for > delivery works in most cases. > > Do you see the same and have any insight what is going on here? > > Greetings > Peter > > > _______________________________________________ > swinog mailing list > [email protected] > http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog > > > _______________________________________________ > swinog mailing list > [email protected] > http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog _______________________________________________ swinog mailing list [email protected] http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog
