Microsoft’s Email Snafu: Exchange Online Outages and Corrupt Messages Stir Global Chaos
Microsoft Exchange Online outage caused email chaos with messages bouncing back like a boomerang with a “554 5.6.0 Corrupt message content” error. While Microsoft partially mitigated the issue, users are advised to send attachments as ZIP files to dodge the glitch until the root cause of the email delivery failures is fixed.

Hot Take:
Microsoft Exchange Online has been playing email hide-and-seek, and it seems that the IT giant has finally managed to partially reign in this pesky game. Perhaps next time, they’ll remember that even their updates need a little quality assurance before being let loose on the world. Meanwhile, users are advised to package up their emails in ZIP files—because nothing says “urgent communication” like a digital gift wrap!
Key Points:
- Microsoft experienced a week-long Exchange Online outage affecting email delivery.
- The outage was identified as a critical service issue tracked under EX1027675.
- A service update introduced a code issue affecting message transport services.
- Users faced failures with Non-Delivery Reports indicating “554 5.6.0 Corrupt message content” errors.
- A similar issue, EX1030895, is still causing email delivery failures for some users.
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