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Using Custom Headers for email delivery

The article explains how to use Microsoft Exchange's Mail Flow Rules to create custom email headers by navigating to the admin portal, accessing Mail Flow > Rules, and setting conditions, which helps improve email delivery and manage third-party filtering or delivery problems.

Using Custom Headers for Email Delivery

If you are using third-party filtering software or have issues with email delivery, you may need to utilize Microsoft Mail Flow Rules.

A more relevant version of this article can be found at step 8 of manual allowlisting.

Steps to Use Custom Headers in Microsoft Exchange

  1. 1.Navigate to https://admin.exchange.microsoft.com.
  2. 2.Go to the Mail Flow > Rules section of the portal.
  3. 3.Create a new Rule.
  4. 4.Name the rule and set the conditions for utilizing the headers, as needed.

This process allows you to configure custom headers to help with email delivery, especially when using third-party filtering software or troubleshooting delivery issues.