Hello,
thanks for your answer, we use xinetd proxys for pop + smtp. We have 500+ users with their domain names as smtp and pop / imap in their email programs (don't ask me why ...).
Thats why we use proxys as "gateway" to the other server. Im not sure if that works with the postfix relay server, but i will check if it fits our needs also.
I see what you are trying to do with this setting and it is a good idea but in our case the customers emails aren't up to date in froxlor (we migrate from an older froxlor/syscp version).
Only as suggestion, if you don't mind: Instead of adding postfix hardcoded, adding the original sendmail_path setting from the php.ini with the added email parameter should help to fit sendmail alternatives also.
Best regards, i love froxlor btw. great work