Proxying when src and dest on non standard ports

Hello,

I want to test dovecot proxying, on a user basis, in a simple set up (proxy, no proxy_maybe and forward the passwd to the remote server). This seem pretty simple except that, in order to test it alongside the production server, I set up 3 servers :

. the proxy, listening to pop and imap on non standard ports 9143, 9993, 9110, 9995 . a proxy destination for some users, listening on 10143, 10993, 109110, 10995 . another proxy destination for some other users, listening on 20145, 20993, 209110, 20995

But there seems to be only one 'port' extra_field, so how can I handle the proxying of both IMAP and POP3 (especially for the same user who can use both) ?

Thanks.

-- Thomas Hummel | Institut Pasteur hummel@pasteur.fr | Groupe Exploitation et Infrastructure