Trying to differentiate different types of service and want to create a low end package that only allows POP and not IMAP, but don't see any way to do it using the Remote API or client limits. Or am I missing something? THanks!
There is no way to limit access to pop3 only in ISPConfig on a per domain or client basis. What you could do is that you add a new mailserver or virtual server as mail server to this ispconfig server and then disable imap in dovecot on that system.