[Dovecot] Smart IMAP proxying with imapc storage

[Willie Gillespie]

On 01/28/2011 11:17 AM, Timo Sirainen wrote:
> On Sun, 2011-01-16 at 18:18 +0200, Timo Sirainen wrote:
>
>> I just committed a very early initial implementation of "imapc" storage
>> backend to v2.1 hg: http://hg.dovecot.org/dovecot-2.1
>
> This is "fully functional" now, at least in theory. TODO:
>
>   * SSL/TLS support to remote server
>   * Don't read entire message bodies into a string in memory
>   * Fetch more than one message at a time when it's known that more
> messages are going to be fetched
>   * Support locally stored indexes
>   * Error handling could be better
>   * Eventually make lib-storage API more asynchronous ->  make imapc more
> asynchronous
>
> Some potential (future) uses for imapc include:
>
>   * Locally caching IMAP proxy
>    * Maybe even fully transparent proxy to client, so at office it would
> be using Dovecot proxy while at home it would connect directly to remote
> server. (A bit tricky with SSL connections, but possible I'd think.)
>   * Filtering proxy that modifies messages on the fly
>   * Fixing Exchange's (and everyone else's) IMAP support by being in
> front of it
>   * Could be used for sharing mailboxes across multiple Dovecot servers
> without shared storage
>   * Easy "perfect migration" from any IMAP server to Dovecot with dsync

+100!  This is great!