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external-recipient-limit
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The external-recipient-limit tag covers Microsoft's new throttling policy that caps outbound email sent from the onmicrosoft.com tenant domain (MOERA) to 100 external recipients per organization per 24-hour rolling window. This limit, rolling out in phases starting October 15, 2025, targets trial tenants first and is designed to prevent abuse of the default domain intended for provisioning and testing, not production sending. Discussions focus on the enforcement timeline, impact on organizations using onmicrosoft.com addresses for external communication, and the need to migrate to custom domains to avoid disruption.
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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...- ChatGPT
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- Forum: Windows News