On Sat, Apr 12, 2014 at 9:12 AM, Miles Fidelman <mfidel...@meetinghouse.net> wrote: > - Yahoo (operationally) and the DMARC authors are intentionally > un-responsive (as are hotmail, comcast, a few others; gmail, I note is not > bouncing mail) > > How do we respond as operators, beyond late-night, ad-hoc patches to list > software, that only partially resolve the problem?
In the face of intentional unresponsiveness: blacklisting. Start contacting Yahoo.com subscribers and explain the situation to these users, and inform the users that, for the time being: yahoo.com e-mail addresses can no longer participate in the mailing lists, because of Yahoo's new policy: And make some suggestions of good alternatives to using Yahoo mail. Then use mail filters to block messages to mailing list addresses with From: header yahoo.com (which cause the problem), next suspend subscriptions for @yahoo.com users, and configure mailing list software so that new @yahoo.com based e-mail addresses cannot subscribe or post to the lists. -- -JH