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[Erik Olson <address@concealed>]

Starting this morning, I've gotten 30% bounces on certain posts, all originating from yahoo.com users, and destined either for yahoo, comcast or Microsoft domains.  Thinking yahoo may have just flipped a nasty switch today.

Is there any fix for this?  If there isn't a real fix for this, I'm thinking of enabling anonymous _sender as a workaround?

<address@concealed>
    (reason: 554 5.7.9 Message not accepted for policy reasons.  See http://postmaster.yahoo.com/errors/postmaster-28.html)

<address@concealed>
    (reason: 550 5.2.0 mqDA1n00W3P1Qtd09qDADW Message rejected due to DMARC. Please see http://postmaster.comcast.net/smtp-error-codes.php#DM000001)

<address@concealed>
    (reason: 550 5.7.0 (BAY0-MC6-F15) Unfortunately, messages from (209.180.212.156) on behalf of (yahoo.com) could not be delivered due to domain owner policy restrictions.)

On 2014-04-07 03:59, Miles Fidelman wrote:

address@concealed">Anybody here find themselves having list messages bounced with error messages like this:

550 5.2.0moUv1n01G12CPsn0coUwb1 Message rejected due to DMARC.

It looks like things can get pretty hairy if someone sends email to a list, from a site that has a published DMARC policy.

This just started happening for a couple of our lists, to one specific ISP (Comcast).  Any thoughts?

Thanks very much,

Miles Fidelman

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Erik Olson
Proudly joining 21st Century e-mail in 2013