Default Microsoft 365 Domains Face 100-Email Daily Limit Starting October
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Microsoft To Limit Onmicrosoft Domain Usage For Sending Emails - Cybernoz - Cybersecurity News
Microsoft has announced significant restrictions on email sending capabilities for organizations using default onmicrosoft.com domains, implementing a throttling system that limits external email delivery to 100 recipients per organization every 24 hours. The policy change, announced through the Exchange Team Blog, aims to prevent spam abuse while encouraging organizations to migrate to custom domains for improved email deliverability and brand…
Default Microsoft 365 Domains Face 100-Email Daily Limit Starting October
Organizations still using default Microsoft 365 email domains face severe throttling starting this October. The restrictions target the onmicrosoft.com domain that Microsoft 365 automatically assigns to new tenants, limiting external messages to 100 recipients per day starting October 15. Microsoft blames spammers who exploit new tenants for quick spam bursts before detection. Affected organizations must acquire custom domains and update primary…
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