one.com: Email delivery issues with Microsoft

one.com · one.comImpact: noneResolved2026-09-04 13:47 UTC

Public — what happened

Summary

Microsoft is accepting incoming emails again. Messages that previously received a “Delivery delayed” notice due to delays on Microsoft’s side are now being delivered gradually. We will continue monitoring the situation until all backlogs have been processed.

Timeline

Started — 2026-09-04 10:52 UTC
Last update — 2026-09-04 13:47 UTC
Resolved — 2026-09-04 22:06 UTC

Source of record: provider status page. Mirrored as reported; times in UTC.

With SquidGrid — where it starts on the route

Independent path health

The status page is the symptom. SquidGrid measures the paths that reach one.com against their own baselines — whether the routes carrying your traffic degraded, at which handoff, and who owns that stretch.

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