[Dovecot] IMAP proxy - can it detect parodying to itself?

[Ben Morrow]

At  4PM +0200 on 26/11/12 you (Graham Leggett) wrote:
> Hi all,
> 
> I have some IMAP servers fronted with separate perdition processes,
> and it would be ideal if I could collapse this down to having dovecot
> do both the IMAP proxying and the IMAP serving at the same time on the
> same IP addresses.
> 
> One of the fields in my LDAP entries contains the canonical name of
> the server that hosts their mailbox, and if I follow the manual at
> http://wiki2.dovecot.org/PasswordDatabase/ExtraFields#LDAP I could add
> the host field to enable proxying.

You also need the 'proxy' or 'proxy_maybe' field, which is a boolean
(the field just needs to be present). If you just configure 'host' you
will get login referrals, which is not what you want.

> My question is whether dovecot has the ability to notice whether
> dovecot is being asked to proxy to itself, in other words the value of
> "host" is the current dovecot server, and when this happens, ignore
> the proxy and just be a straight IMAP server, because the user has
> connected to the right box already.

This is what happens if you use 'proxy_maybe' instead of 'proxy'.

Ben