Hey, > Also as for rejecting invalid DKIM mails: People should really not do > that unless DMARC tells them to. That _is_ a problem already and will get worse this year. Yahoo has already published a "reject invalid" policy nearly two years ago[1]. See: [0 mosu@sweet-chili ~] host -t txt _dmarc.yahoo.com _dmarc.yahoo.com descriptive text "v=DMARC1; p=reject; pct=100; rua=mailto:dmarc_y_rua@xxxxxxxxx;"; It's known that Google will switch from "report" to "reject" this year, too[2]. At the moment they're only at "quarantine" which is bad enough already: [0 mosu@sweet-chili ~] host -t txt _dmarc.googlemail.com _dmarc.googlemail.com descriptive text "v=DMARC1; p=quarantine; sp=quarantine; rua=mailto:mailauth-reports@xxxxxxxxxx"; Mailing list administrators have to act _now_ and make their lists DKIM compliant; otherwise more and more list mails will not reach their intended destinations. I already had to change my own DMARC policy from "reject" to "report" because I'm subscribed to too many mailing lists that break DKIM. Yes, this may not be the reason Yahoo currently rejects our mails, but it _is_ a problem on our side that the Arch lists haven't addressed yet. As long as there's such a known problem on our side speculating about _other_ potential reasons why Yahoo is rejecting mails is moot. Please, dear Arch list maintainers, change the mailman settings accordingly. Please. See [3] for how mailman can deal with DMARC. Kind regards, mosu [1] http://sendgrid.com/blog/update-yahoos-dmarc-policy/ [2] https://dmarc.org/2015/10/global-mailbox-providers-deploying-dmarc-to-protect-users/ [3] http://wiki.list.org/DEV/DMARC
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