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since beta thread has been removed and there was some comments there about "External" domain setting I would like to return to this topic.
Currently it would just use the hop counter to kill messages that get stuck in a loop.
We will add a check to make sure SmarterMail doesn't send to an IP that it is listening on in a future build.
For outgoing gateways, if set to send to the MX it will send out through the gateway. If you set it to send to a hostname it will send directly to that address instead of using the gateway.
For incoming gateways with user verification we will need to have the primary server return to the incoming gateway that the domain has a catch all alias so any user address will be accepted. That isn't in there at the moment, but should be in the next build.
— Bryon Grosz (5/29/2015 7:42 PM)
Has this function been added in "next build"? I would like to mark all of my domains as external so all emails even local must be sent to proper MX configuration and I'm not sure if current build can do that in my scenario.