Microsoft puts the squeeze on onmicrosoft.com freeloaders

go.theregister.com/feed/www.theregister.com/2025/08/22/microsoft_throttling_onmicrosoft

Windows giant takes aim at spammers exploiting new 365 tenants
Microsoft has issued a warning to companies using the onmicrosoft.com domain for emails: get your domain sorted out or face throttling.…

This story appeared on go.theregister.com, 2025-08-22 13:24:08.
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