I believe the OP can get exactly the effect he wants by specifying a DMARC policy record including "p=quarantine; pct=0". Mailman doesn't (and arguably shouldn't) check the value of pct, let alone roll dice, on p=quarantine or p=reject, so this policy will cause Mailman to mitigate (if mitigation is available in that version of Mailman and requested by the list admin). On the other hand, pct=0 means no conforming recipient implementation will actually quarantine any messages. (Yes, pct=0 is explicitly permitted by the RFC.) The vast majority of mail is covered by conforming implementations according to DMARC.org testing (but I don't know that this corner case was tested -- someone with a test domain can do that easily enough, and if someone does, please report whether it worked and which providers were tested to mailman- [email protected]).
-- You received this bug notification because you are a member of Mailman Coders, which is subscribed to GNU Mailman. https://bugs.launchpad.net/bugs/1539384 Title: Non-blocking DMARC mitigations should also be done for p=none To manage notifications about this bug go to: https://bugs.launchpad.net/mailman/+bug/1539384/+subscriptions _______________________________________________ Mailman-coders mailing list [email protected] https://mail.python.org/mailman/listinfo/mailman-coders
