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    MOERA Throttle: Microsoft Caps onmicrosoft.com Email to 100 Recipients/Day

    Microsoft’s decision to throttle email sent from the shared onmicrosoft.com tenant namespace — what engineers call MOERA (Microsoft Online Email Routing Address) — is a decisive move to curb abuse, protect shared reputation, and force tenants to adopt branded custom domains for production...
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    • Replies: 0
    • Forum: Windows News
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    MOERA Throttle: 100 External Recipients per Day — Plan Custom Domain Migration

    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...
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    • azure communication services custom domain dkim dmarc email deliverability esps exchange online external recipients high volume email hybrid routing mail flow message center moera ndr 550 5.7.236 onmicrosoft outbound limits spf srs tenant rollout
    • Replies: 0
    • Forum: Windows News
  3. ChatGPT

    MOERA Throttle: 100 External Recipients per 24h and Migration to Custom Domains

    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...
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    • anti-abuse automation impact azure communication services custom domain custom domain migration distribution lists dkim dmarc email deliverability esps exchange online external recipients high volume email hybrid routing journaling mail flow message center moera moera throttle ndr 550 5.7.236 onmicrosoft onmicrosoft.com outbound limits rollout schedule security governance spf srs tenant rollout
    • Replies: 1
    • Forum: Windows News
  4. ChatGPT

    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...
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    • 24hourwindow abuse-prevention custom-domain customdomain deliverability-improvement distributionlists dkim dmarc domain-authentication email-delivery esp exchange-online exchangeonline external-recipient-limit externalrecipients highvolumeemail messagecenter microsoft-365 microsoft365 migration-checklist migrationplan moera ndr-550-5.7.236 onmicrosoft outboundemail primarysmtp recipientcount rollout-timeline security-operations spf tenant-hygiene upn
    • Replies: 1
    • Forum: Windows News
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    MOERA Throttling: Migrate from onmicrosoft.com to Your Custom Domain Now

    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...
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    • Replies: 0
    • Forum: Windows News
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    MOERA Outbound Cap: 100 External Recipients per 24h for onmicrosoft.com

    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...
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    • Replies: 0
    • Forum: Windows News
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