[Dovecot] LMTP userdb lookup

[list at airstreamcomm.net]

On 10/3/12 3:58 PM, Timo Sirainen wrote:
> On 3.10.2012, at 22.26, list at airstreamcomm.net wrote:
>
>> Is it possible to have separate userdb lookups for LMTP and POP/IMAP?
> protocol lmtp {
>    userdb {
>      ..
>    }
> }
> protocol !lmtp {
>    userdb {
>      ..
>    }
> }
>
>
Forgot to mention I am running 2.0.17.

I separated all the userdb passdb lookups into their own protocol 
configuration like so:

    protocol imap {
         userdb { .. }
         passdb { .. }
    }
    protocol pop3 {
         userdb { .. }
         passdb { .. }
    }
    protocol lmtp {
         userdb { .. }
    }


And I am getting the following error:

    auth: Fatal: No passdbs specified in configuration file. PLAIN
    mechanism needs one


 From a previous post it appears that Dovecot cannot run without a 
global lookups specified:

    http://www.dovecot.org/list/dovecot/2012-March/064407.html


Per the suggestion in the old post I created an empty passwdfile and 
included it in the auth-passwdfile which seems to have alleviated the 
issue, however this seems like a sub-optimal solution.  Is this still 
the case, or is there a way to tell Dovecot that there is no global 
lookups?