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abuse prevention
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.
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...