[Dovecot] max connects per host?

[subscriber at viliar.net.ru]

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.