Sophos Email customers using IP-based mailflow rule connectors must migrate to certificate-based configuration by March 31st. To see if you're affected Click Here.

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M365 Mail Connector Setup Failure

Justin Hoeft

I had a domain connected and working. Out of idle curiosity, I hit the test button on the M365 Mailflow page associated with one of my domains. After running for a while, it reported the test failed and changed the domain status to disconnected. The reconnect button now produces an error with a red X after signing in, the error reads "Mailflow Rules not configured. Please try again." On the O365 side I can see the rules have been created then deleted. I deleted the domain from the Mailflow settings and now cannot add it back.



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[edited by: Raphael Alganes at 6:14 AM (GMT -7) on 7 Jun 2023]
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