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Office 365 mail flow delays – where to look first?

Question by Alice · Sep 29, 2025

Office 365 mail flow delays – where to look first?

Asked by Alice • Sep 29, 2025

Users report occasional delays in inbound mail (minutes to tens of minutes). Any checklist to pinpoint the cause?

Answers

Network Technology • Staff Sep 29, 2025 10:45
Check Exchange Online service health, run message trace, verify SPF/DKIM/DMARC and ensure no downstream gateway queues mail.
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