Joly MacFie writes: > 1) I have struggled with my DH mailman instances to egt DMARC / > DKIM to work, particularly withgmail addresses / aliases. I > imagine that Googlle Groups has this sorted.
If you count cheating as "sorted", yes. The problem with Gmail is that they lie about their DMARC policy. If you send *from* a Google address *via* a third party mailing list *to* a Gmail subscriber, Google will reject that post, even though Google has p=none as its policy. ARC helps because gmail participates in that protocol based on the list host's reputation. Also Mailman (I think both 2.1.39 and recent 3.3.x) has an option to treat some domains as p=reject regardless of what their announced DMARC policy is (gmail.com is in there by default). Since from gmail via groups to gmail is all within Google's internal mali system, DMARC never comes into it. -- GNU Mailman consultant (installation, migration, customization) Sirius Open Source https://www.siriusopensource.com/ Software systems consulting in Europe, North America, and Japan ------------------------------------------------------ Mailman-Users mailing list -- [email protected] To unsubscribe send an email to [email protected] https://mail.python.org/mailman3/lists/mailman-users.python.org/ Mailman FAQ: http://wiki.list.org/x/AgA3 Security Policy: http://wiki.list.org/x/QIA9 Searchable Archives: https://www.mail-archive.com/[email protected]/ https://mail.python.org/archives/list/[email protected]/ Member address: [email protected]
