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Microsoft has announced a major update to the requirements for SMTP (Simple Mail Transfer Protocol) communication protocol relay via its Exchange Online platform. Although not immediately effective as the change is set to kick off later in the year at the start of November, the tech giant shared this update in advance so IT admins and system admins are aware of the upcoming alteration.
The Exchange Team published the information on a Tech Community blog post where it shared the new requirements as well as the current ones. As per the update, the SMTP P2 header (sender) domain need not match:
Microsoft has also outlined some of the major limitations and has detailed ways to minimize the ill effects of the update:
You may find more details about the updated requirements on the Tech Community blog post on the official website. Speaking of requirements, Microsoft recently quietly updated the AMD, Intel, and Qualcomm CPU lists supported on Windows 11, right after it released the Moment 3 feature update.
The Exchange Team published the information on a Tech Community blog post where it shared the new requirements as well as the current ones. As per the update, the SMTP P2 header (sender) domain need not match:
Microsoft has also outlined some of the major limitations and has detailed ways to minimize the ill effects of the update:
You may find more details about the updated requirements on the Tech Community blog post on the official website. Speaking of requirements, Microsoft recently quietly updated the AMD, Intel, and Qualcomm CPU lists supported on Windows 11, right after it released the Moment 3 feature update.

