Proxy to more Servers

[Luca Bertoncello]

Hi list!

Finally I got the LDAP-Authentication work (it was a problem of the  
OU-Path... :( ).
Now I can authenticate the user against the AD and forwarding the  
IMAP-Connection to the Exchange Server.
Wow!

My next problem: we have TWO ADs and TWO Exchange-Servers. The first  
AD has the users for the first Exchange, and the second AD for the  
second Exchange.

I defined two files so:

auth-ldap-OLDAD.conf.ext:

passdb {
   driver = ldap
   args = /etc/dovecot/dovecot-ldap-OLDAD.conf.ext
}

userdb {
   driver = ldap
   args = /etc/dovecot/dovecot-ldap-OLDAD.conf.ext

   default_fields = imapc_user=%u imapc_password=%w imapc_ssl=imaps  
imapc_host=sphinx.company.local imapc_port=993 driver=imap  
uid=imapproxy gid=imapproxy home=/home/imapproxy
}


auth-ldap-NEWAD.conf.ext:

passdb {
   driver = ldap
   args = /etc/dovecot/dovecot-ldap-NEWAD.conf.ext
}

userdb {
   driver = ldap
   args = /etc/dovecot/dovecot-ldap-NEWAD.conf.ext

   default_fields = imapc_user=%u imapc_password=%w imapc_ssl=imaps  
imapc_host=exchange01.ad.company.org imapc_port=993 driver=imap  
uid=imapproxy gid=imapproxy home=/home/imapproxy
}

Well, the authentication works as expected, but when a user of the  
second AD/Exchanges tries to log in, after a SUCCESSFULLY  
authentication can't speak with the new Exchange server... :(

In the log of Dovecot I see:

Jun 23 15:07:58 proxy01 dovecot: imap(chorris): Error: User  
initialization failed: Namespace '': Mailbox list driver imapc:  
missing imapc_host
Jun 23 15:07:58 proxy01 dovecot: imap(chorris): Error: Invalid user  
settings. Refer to server log for more information.

Could someone explain me, why the configuration for imapc_host in the  
second file are ignored?

Thanks
Luca Bertoncello
(lucabert at lucabert.de)