Jakob Bohm <jb-gnumli...@wisemo.com> writes: > Unfortunately, the rushed implementation of the SPF+DKIM+DMARC > combination meant that handling of mailing lists wasn't properly > integrated in the specifications. Which in turn resulted in some > pretty horrible implementation ideas by both the DMARC group (having > each mail list server set up complex e-mail aliases for each > participant) and MailMan (suggesting that mailing lists kick out any > participants on a DMARC-compatible mail server).
Note that ARC[1] is coming, which will allow mailing lists to provide authentication while doing the conventional modifications. Also, Mailman doesn't suggest kicking out participants on DMARC-compatible servers. It provides a range of options[2] for how to handle mail from posters who have DMARC set to "reject" or "quarantine" only. [1]: http://arc-spec.org/ [2]: https://mailman.readthedocs.io/en/latest/src/mailman/handlers/docs/dmarc-mitigations.html
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