Microsoft is imposing a hard cap on outbound email sent from the shared onmicrosoft.com tenant namespace: mail from MOERA (Microsoft Online Email Routing Address) domains will be throttled to 100 external recipients per organization in any 24‑hour rolling window, with attempts beyond that...
Microsoft’s Exchange team has announced a sweeping, tenant-level restriction that will limit outbound email sent from the shared onmicrosoft.com namespace (MOERA — Microsoft Online Email Routing Address) to 100 external recipients per organization per 24‑hour rolling window, and the change comes...
Microsoft has given a clear ultimatum to organizations still using the shared .onmicrosoft.com sending address: migrate to a verified custom domain or expect severe outbound throttling that will constrain external email to just 100 external recipients per organization in any 24‑hour rolling...
Microsoft is imposing a hard limit on outgoing email from free “.onmicrosoft.com” (MOERA) tenant domains to combat widespread abuse and protect delivery for legitimate Microsoft 365 customers, and the change — which takes effect in staged waves starting October 15, 2025 for trials — restricts...