Problems with mail SNI

TechDaddies

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Joined
May 3, 2020
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35
We have mail SNI set up (This is a new installation, so it's the default) but it's not working for some domains on the server, and I cannot figure out why. We're using https://www.checktls.com/TestReceiver to test. An example of a domain that is working: kitchenknifefora.com/mail.kitchenknifefora.com. An example of a domain that's NOT working: advertisingresults.com/mail.advertisingresults.com

For the life of me, I can't figure out what's going on. Both domains have Lets Encrypt certificates covering the root, www, and mail domains so there's no reason those certs shouldn't be being used to service mail requests for both domains.
 
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