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If I use External MX record instead of local, I get huge spool activity
Problem reported by Brian Bjerring-Jensen - 5/17/2025 at 3:06 AM
Submitted
If I change from local to External (use MX record) then my spool folder goes bananas! Mails keep shifting between "Waiting to deliver" and spool....

And I have a hard time catching them because they shift so quickly.

It stops completely when I shift to "local" in inbound message delivery.



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Douglas Foster Replied
Sounds like you created a loop.   That feature is intended for use when some users are on a different environment.  You need to ensure that anything redirected to the external MX server never returns to the SmarterMail server.  This includes ensuring that an invalid address will not cause a loop.

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