Comment by drhagen
2 hours ago
They spent a huge amount of complexity supporting mailing lists that claim mutated messages came FROM the original sender instead of FROM mailinglist@example.com. Is that use-case worth the additional effort?
2 hours ago
They spent a huge amount of complexity supporting mailing lists that claim mutated messages came FROM the original sender instead of FROM mailinglist@example.com. Is that use-case worth the additional effort?
Yes! Forwarding is the reason mail flow authentication does not work very well today. Fix the forwarding use cases (and by extension: mailing lists & out of office arrangements) and we can finally just tell all senders: "Your domains do not match, please use DMARC so we can automatically detect whether that is OK. No excuses, no exemptions, your use case can be dealt with using DMARC!"
Yes. Mailing lists are incredibly useful and very hard to change.