[Dovecot] proxy host specified as fqdn in userdb

[Timo Sirainen]

On Tue, 2007-03-27 at 00:56 +0300, Apostolos Papayanakis wrote:
> Abstract from http://wiki.dovecot.org/PasswordDatabase/ExtraFields/Proxy
> 
> >
> > host=s: The destination server's *IP address*. This field is required. 
> > Note that currently it's required to use an IP address since no DNS 
> > resolving is done.
> >
> Hello Timo,
>   Here goes one more item for the v2.0 wishlist:
>   Will it become possible to do dovecot imap proxying based on a "host" 
> userdb attribute that is an FQDN (instead of a numeric IP as it is now)?

The problem with this is that it would require adding asynchronous DNS
library to Dovecot, or alternatively hoping that your DNS server is
never down (and hanging when it is). I don't really want to implement
the latter, and adding async DNS library just for proxying which is used
by very few people seems a bit bloaty.

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