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I am in the process of switching a departments old email server to my Smartermail server.
Prior to performing the official switch (when I update their domains NS records) I went ahead and created their domain in Smartermail. However, I marked the domain as disabled.
My hope was that this would save me some time so, on the day of the switch, all I would have to do is change their DNS settings and it would start working.
Well, there was a problem.
Whenever a user from my domain sent an email to the department's domain, it got locally delivered, even though that domain was not active yet and was marked as disabled.
I checked my log files and it specifically says "Starting local delivery to...".
Obviously if Smartermail is hosting a domain it doesn't check DNS to verify and simply delivers locally, whether the domain is disabled or not.
I don't know if this is the intended behavior. If so, a disclaimer needs to be made on the 'Disable Domain' setting that locally delivered emails will still be delivered.
Director of IT
Archdiocese of Mobile