I have a need for a single host on my LAN to be able to authenticate & send outgoing mail via Kopano4UCS. In testing via telnet I realised that authentication is not enabled:-
AUTH LOGIN 503 5.5.1 Error: authentication not enabled
So my question is what would be the optimum way to allow preferably authenticated access for a single host within my lan to send mail, or failing that, allow a single host to relay outgoing mail without auth. Having looked into the postfix config files on Kopano4UCS systems I’ve realised that there’s a lot of automation going on with the Univention Config Registry values being written to config and that charging ahead with manual editing of config files is probably a bad idea for a non-expert like myself. Hence the question here. Hoping someone might be able to advise.