MC559257 – Microsoft 365 Outbound Email Relaypool

Admin impact, Feature update, Microsoft 365 Defender, Stay Informed

check before: 2023-06-06

Product:

Defender, Exchange, Microsoft 365 admin center, Microsoft 365 Defender, SharePoint

Platform:

Online, World tenant

Status:

Change type:

Feature update, Admin impact

Links:

Details:

This is an update regarding the configuration for relaying or forwarding email through Office 365. Please note that while this change was originally implemented in April 2022, we will now be implementing a further enhancement to improve security and reliability of our email services.
[When this will happen:]
Starting May 30, 2023 we will be updating special relay pools used for relayed messages via connectors. This change will impact only the messages sent from domains not registered as accepted domains in your tenant.
To avoid any service disruptions or issues, we strongly recommend you review and complete the suggested actions outlined below.

Change Category:
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Scope:
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Release Phase:

Created:
2023-05-23

updated:
2023-05-23

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