[Dovecot] max connects per host?

Hi everyone!

I want to manage mail server resource part (like it can CGP) and with it I have one question. Is any way to limit overall max simultaneous connections to imap/pop3 server from one(each) host, except use iptables/ipfw and so on? Like a patch to dovecot or, maybe, it can be released in future versions?

I know about mail_max_userip_connections in dovecot 1.1

but it can't limit hosts this way.

Thank you.