[Dovecot] How to run Dovecot as IMAP Proxy?

Hi All,

I have migrated from uw-imap to Dovecot for POP3 & IMAP service. I run webmail using squirrelmail. When running uw-imap I used to run up.imapproxyd on the webmail server for faster responses. After migrating to Dovecot, I find that up.imapproxyd does not work well with dovecot.

I tried to use dovecot as IMAP PRoxy server as per the document

http://wiki.dovecot.org/PasswordDatabase/ExtraFields/Proxy

I don't understand Databases and don't want to install mysql etc for a simple thing like IMAP PRoxy.

My question is can Dovecot be run as a IMAP PRoxy without the hassle of setting up mysql etc? I use /etc/passwd for auth on the actual dovecot server running IMAP & POP3.

Thanks V S Rao