using cyrus as imap proxy

[Bron Gondwana]

On Sun, Nov 30, 2008 at 10:19:23AM +1030, Stephen Carr wrote:
> Dear Bron
>
> Would http://www.imapproxy.org/ fit the bill?
> I use with SquirrelMail and it does speed up the transfers as it caches  
> the users credentials with s hit ratio near 20:1.

Yes, it would - but it only speeds up logins.  (ahh, good old squirrelmail.
I remember it well.  I'm listed in the "Past Developers" section of the
docs.  Was active for a bit back when email service wasn't my primary job
and I ran it for my work)

I want something that actually caches mailbox contents, so that non-write
queries don't need _any_ traffic to the server.  The ultimate would be an
offline mode that actually worked disconnected, and synchronised state with
the imap server on reconnection.

(note: you have to accept UID promotion as a fact of life - basically if
there's a UID conflict you delete that UID at BOTH ends and re-inject both
messages into the mailbox so you get two new copies with different UIDs)

Bron.