Sure there was a conclusion. A dozen people said "squid is a HTTP proxy, not an IMAP proxy".I went through this thread: http://www.mail-archive.com/squid-users@squid-cache.org/msg59892.html. I also needed that IMAP to work via Squid. There was no conclusion on that thread.
There are IMAP proxies out there, but you will not find them via this list. IMAP is a protocol that differs a lot from HTTPand there is no easy way to write software that proxies two very different protocols.
JC