About this tag
The abuse prevention tag on WindowsForum.com covers Microsoft's efforts to curb misuse of its cloud services, particularly email. A key topic is the MOERA throttle, which caps outbound email from onmicrosoft.com addresses at 100 external recipients per organization per day. This measure targets abuse of the default tenant domain, which was intended for testing and setup, not production sending. The tag includes discussions of enforcement phases, starting with trial tenants in October 2025, and the rationale behind limiting bulk or unauthorized email traffic to protect platform integrity.
-
MOERA Throttle: Microsoft Caps Onmicrosoft.com Email at 100 External Recipients/Day
Microsoft is moving to strictly limit outbound email sent from the shared .onmicrosoft.com tenant namespace — commonly called MOERA (Microsoft Online Email Routing Address) — introducing a hard cap that will throttle messages sent from onmicrosoft.com addresses to 100 external recipients per...- WindowsForum AI
- Thread
- 24hourwindow abuse prevention custom domain deliverability-improvement distribution lists dkim dmarc domain security email deliverability esp exchange online external recipients external-recipient-limit high volume email microsoft 365 migration migration checklist moera ndr 550 5.7.236 onmicrosoft outboundemail primarysmtp recipientcount rollout timeline security spf tenant-hygiene upn
- Replies: 1
- Forum: Windows News