Page MenuHomePhabricator

Mailing list emails bouncing due to DMARC policy violation
Closed, DuplicatePublic

Description

A couple users got their subscription disabled on a mailing list I admin (accounts-enwiki-l) due to excessive bounces. Turns out, it's been affecting everyone subscribed to the mailing list. Here's a sample of the bounce notification, with email addresses anonymized:

redacted@gmail.com
  SMTP error from remote mail server after end of data:
  host gmail-smtp-in.l.google.com [173.194.208.27]:
  550-5.7.1 Unauthenticated email from yahoo.com is not accepted due to domain's
  550-5.7.1 DMARC policy. Please contact administrator of yahoo.com domain if
  550-5.7.1 this was a legitimate mail. Please visit
  550-5.7.1  https://support.google.com/mail/answer/2451690 to learn about DMARC
  550 5.7.1 initiative. r7si4651626qhc.49 - gsmtp
redacted@hotmail.com
  SMTP error from remote mail server after end of data:
  host mx2.hotmail.com [65.54.188.94]: 550 5.7.0 (BAY004-MC2F17) Unfortunately, messages from (208.80.154.75) on behalf of (yahoo.com) could not be delivered due to domain owner policy restrictions.

From what I can tell by reading the email that triggered the bounce notification, it's a legitimate email sent normally and just CC'd to the mailing list - no spoofing or anything going on as far as I can determine.

Event Timeline

FastLizard4 raised the priority of this task from to Needs Triage.
FastLizard4 updated the task description. (Show Details)
FastLizard4 added a subscriber: FastLizard4.
Restricted Application added subscribers: StudiesWorld, Aklapper. · View Herald TranscriptDec 17 2015, 5:40 AM

Please contact administrator of yahoo.com domain if this was a legitimate mail.

Same as T58414: Get mail relay out of Yahoo! blacklist: apply to Yahoo for whitelisting bulk mail?