SMTP Relay Requirements & Conditional Access Policies
🚨 Change Alert Currently, there are 2 very important changes in Microsoft 365, which you shouldn’t miss 📢: 1. New SMTP Relay Requirements: As of November 1st, 2023, when you relay your emails via Exchange Online to the internet, the review of the accepted domain switched from P2 header (will be ignored) to P1 header. […]
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