dovecot - Oct 2012 - Can Dovecot authenticate against an external email server?

Just wondering if anyone has done this.

I have a spam filtering service where I am now storing spam for users I 
filter for. It's a filter and forward service so I don't control the 
recipient's email server.

What I would like to do somehow is have the user enter their email 
address and password and then look up their POP/IMAP server from a 
database and try to authenticate from it. If sucessful then the user 
will be able to access their stored spam using Dovecot and Squirrelmail.

Any suggestions?

Thanks in advance

On 23.10.2012, at 23.51, Marc Perkel wrote:
> Just wondering if anyone has done this.
> 
> I have a spam filtering service where I am now storing spam for users I
filter for. It's a filter and forward service so I don't control the
recipient's email server.
> 
> What I would like to do somehow is have the user enter their email address
and password and then look up their POP/IMAP server from a database and try to
authenticate from it. If sucessful then the user will be able to access their
stored spam using Dovecot and Squirrelmail.
http://wiki2.dovecot.org/PasswordDatabase/IMAP