Service Alert: Microsoft Email Delivery Delays — November 12-13, 2026

Microsoft is currently experiencing a widespread outage affecting Outlook, Exchange Online, and other Microsoft 365 services. As a result, emails sent to recipients using these services may be delayed until Microsoft resolves the issue.

If your mailing list includes a significant number of Microsoft email users, you may notice temporarily lower open and click rates while deliveries are delayed.

There is no need to resend your campaign. Direct Mail will automatically retry temporarily delayed deliveries until Microsoft's servers are accepting mail again. No action is required on your part.

For updates, visit Microsoft's Service Status page or Microsoft 365 Status on X. We'll also update this notice as more information becomes available.

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API

  1. Getting Started
  2. Webhooks
  3. Integrating with Zapier
  4. /projects
  5. /projects/:document_identifier
  6. /projects/:document_identifier/address-groups
  7. /projects/:document_identifier/address-groups/:address_group_uuid
  8. /projects/:document_identifier/address-groups/:address_group_uuid/addresses
  9. /projects/:document_identifier/address-groups/:address_group_uuid/addresses/:address_uuid
  10. /projects/:document_identifier/messages
  11. /projects/:document_identifier/messages/:message_uuid
  12. /projects/:document_identifier/messages/:message_uuid/attachments
  13. /projects/:document_identifier/messages/:message_uuid/attachments/:attachment_uuid
  14. /projects/:document_identifier/messages/:message_uuid/headers
  15. /projects/:document_identifier/messages/:message_uuid/headers/:header_uuid
  16. /projects/:document_identifier/reports
  17. /projects/:document_identifier/reports/:report_uuid
  18. /projects/:document_identifier/reports/:report_uuid/links
  19. /projects/:document_identifier/reports/:report_uuid/links/:link_uuid
  20. /projects/:document_identifier/reports/:report_uuid/links/:link_uuid/clicks
  21. /projects/:document_identifier/reports/:report_uuid/message
  22. /projects/:document_identifier/reports/:report_uuid/recipients
  23. /projects/:document_identifier/reports/:report_uuid/recipients/:recipient_uuid
  24. /projects/:document_identifier/reports/:report_uuid/recipients/:recipient_uuid/archived-address
  25. /projects/:document_identifier/reports/:report_uuid/recipients/:recipient_uuid/clicks
  26. /projects/:document_identifier/reports/:report_uuid/recipients/:recipient_uuid/live-address
  27. /projects/:document_identifier/reports/:report_uuid/recipients/:recipient_uuid/opens
  28. /projects/:document_identifier/webhooks
  29. /projects/:document_identifier/webhooks/:webhook_uuid