Degraded e-mail deliverability for Microsoft 365

Resolved
Resolved

Email delivery to Microsoft 365 and Outlook inboxes has returned to normal. If you experienced delayed or missing booking notification emails between August 14 and August 16, this should now be resolved.

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Recovering

We have received an elevated level of delivery failures to inboxes hosted by Microsoft 365. We suspect Microsoft has automatically blacklisted our emails and we are working with them on a solution. We believe that Microsoft has delisted us from their blacklist and normal operations should resume. We are awaiting confirmation from users.

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Began at:

Affected components
  • Email delivery