On Sun 05/Mar/2017 21:08:49 +0100 Vincent Danjean wrote:
I was under the impression that DMARC plays very bad with mailing lists. If I recall correctly, mailman has to modify mails that come from a DMARC domain.
Your impression is correct. However, there's nothing that Debian can do or omit --except denying subscription to those whose mailbox belongs to a DMARC-strict domain-- that can relieve it from DMARC processing by recipients' MX servers. That is to say, (1) Debian can enable some anti-DMARC actions in Mailman configurations to avoid delivery problems, and (2) it can publish SPF, DKIM, and DMARC records. Feedback resulting from (2) might inform a strategy for (1), but no reasonable choice of (2), including doing nothing, is going to alter /the effects/ of decisions made in (1).
In any case, message 13[*] would have passed as authentic, as it was. [*] https://lists.debian.org/debian-devel/2017/03/msg00013.html hth Ale