Sayan Sen Neowin · Jun 20, 2023 03:46 EDT · Hot! with 2 comments
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. Terminal
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:
Currently, to relay email through Exchange Online, two conditions must be true:
On November 1, 2023, we are removing the matching condition for the SMTP P2 sender domain (1c above). After we remove this condition, relaying email through Exchange Online will require the following:
After November 1, 2023, if either of the above conditions are not met, the relay attempt from your on-premises environment to Exchange Online will be rejected.
Microsoft has also outlined some of the major limitations and has detailed ways to minimize the ill effects of the update:
This change may affect your organization’s email routing or delivery. Possible scenarios that are affected by this change include, but may not be limited to:
To minimize the effects of this change before November 1, 2023:
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.
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