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Phabricator task notification emails not delivered (Microsoft email; DMARC)
Closed, ResolvedPublicBUG REPORT

Description

I have not received notification emails related to updates to Maniphest tasks on this Phabricator since around 2026-01-20 20:00 UTC, even though if I go to Subscriptions (and Settings → Email Preferences) I can confirm there have been several updates to tasks I subscribe to that would have triggered email notifications. I've checked the spam folder.

Event Timeline

@Nardog we changed our DMARC policy on wikimedia.org to quarantine on 2026-01-20, so that is probably the cause of the deliverability issue. I'll look into why the emails are getting rejected and revert the change if necessary.

@Nardog this appears to be an issue with Microsoft's email platform, they are throttling our mail server. I have opened a ticket with the support desk to try and get the issue resolved.

jhathaway triaged this task as High priority.

@Nardog Microsoft appears to have resolved the issue, are you receiving ticket updates now?

Around 2026-01-23 12:00–15:00 UTC I received the emails I had missed in seemingly random order, and now it looks back to normal. Thanks for your effort @jhathaway.

great, I'll resolve then, let me know if new problems arise.

Aklapper renamed this task from Phabricator task notification emails not delivered to Phabricator task notification emails not delivered (Microsoft email; DMARC).Sat, Jan 24, 9:46 PM