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Is Microsoft’s Anti-Spam System Misbehaving? Here’s What You Need to Know!
Emails stuck in quarantine? If you’re an Exchange Online administrator scratching your head over undelivered messages or misplaced emails as of March 21, 2025, you’re not alone. Microsoft has flagged this issue in the Microsoft 365 Admin Center under entry EX1038119, citing a bug that’s causing chaos with their anti-spam systems.
What’s Happening?
Microsoft’s anti-spam system is miscategorizing certain URLs. This glitch is mistakenly quarantining emails that should’ve been delivered without issue. They’ve labeled this as a critical service problem.
When Did It Start?
The trouble began at 10:11 UTC (12:11 CET). Since then, affected users have been dealing with unexpected email quarantines.
Who’s Impacted?
Microsoft hasn’t clarified which regions are caught in this mess. The vague explanation mentions “certain URLs,” but there’s no detailed breakdown of affected areas or users.
What’s Microsoft Doing About It?
Technicians are scrambling to fix the issue. Their initial attempt to add these miscategorized URLs to a permission list didn’t work. Now, they’re manually correcting email locations and hunting for more problematic URLs to resolve the situation.
What Should You Do?
- Check Your Quarantine Folder: If you’re missing emails, they might be sitting in quarantine due to this bug.
- Stay Updated: Keep an eye on the Microsoft 365 Admin Center for updates under entry EX1038119.
- Communicate with Users: Let your team know about the issue and advise them to check their quarantined messages regularly until this is resolved.
This bug is a headache, but knowing what’s going on can help you stay ahead of the problem and minimize disruptions for your organization.