On 2020/06/02 10:37, Benoit Panizzon via mailop wrote: > <<< 550-5.7.1 [2001:4060:dead:beef::1 19] Our system has detected that > this > <<< 550-5.7.1 message is likely suspicious due to the very low reputation of > the > <<< 550-5.7.1 sending domain.
"due to the very low reputation of the sending domain", I'm surprised that made it through legal... > DKIM is not a solution. I faced too many problems with mailinglists > and similar which did alter the header and broke DKIM signatures. DKIM isn't (or at least shouldn't be) used as an absolute check unless it's combined with a restrictive DMARC setting - usually it just feeds in to an overall score. Failing DKIM doesn't mean that people won't see a mail at all and when combined with other positive scores usually assigned to genuine mailing list servers, it will often still get through. You are likely to need all the tricks in the book to get mail delivered over IPv6 into gmail (many people just gave up - most of the common open- source MTAs have methods to avoid delivering over v6 to certain servers precisely because of this) - DKIM definitely seems to be something worth doing. _______________________________________________ mailop mailing list [email protected] https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
