Yes the Exchange need all accounts to match, we only uses encrypted communication and no Anonymus, no port 25. Yes basically every device has an account, but with 2 firewalls and a Service Provider it is such an hassle to allow every single one, so we group them together and relay under now 1 account per group. It would be cool if could just tell the service to listen to multiple ports on one interface. so lets say ---in- listens on 465, --iot- listens on 44444 --term- on 44446 and then --in-foward-...
Possible to use multiple Accounts with multiple "relays"