this post was submitted on 23 Aug 2025
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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 […] The post Microsoft to Limit Onmicrosoft Domain Usage for Sending Emails appeared first on Cyber Security News.

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