[Dovecot] [Postfix] SASL Auth. using Dovecot with password forwarding proxy configuration

[Timo Sirainen]

On 3.9.2012, at 2.41, Adi Pircalabu wrote:

> Are there any plans to have Dovecot authentication service to do SMTP
> authentication against IMAP or POP3 proxy provided information? This,
> of course, means we'd have the authentication result tied to the
> response of the backend IMAP/pop3 server.

I don't see any clean way of doing that.

>>> My question is, given the above: is there a way to get SMTP
>>> authentication properly in this scenario?  
>> 
>> Make Postfix authenticate against the backend Dovecot server. You'll
>> need to setup service auth { inet_listener } to some port for it.
> 
> The POP/IMAP backends are running Courier IMAP, as I've just mentioned
> and due to the existing hosting environment it's very unlikely to
> replace it with something else.

Maybe use IMAP authentication as the backend? pam_imap at least can do that. Or you can already also use Dovecot v2.1's passdb imap to do this, pretty much equivalent to pam_imap.