[Dovecot] password_query, user_query and unrelated userid and emails

[Timo Sirainen]

On Sat, 2010-09-25 at 15:23 +0200, Axel Luttgens wrote:
> Let's say one has a SQL table with following fields for John Doe:
> 
> 	login:		u0007
> 	password:	{SHA1}...
> 	mailhome:	/path/to/joeshome
> 	email:		john.doe at example.com
> 
> To log in, for internal policy reasons, John MUST make use of his userid "u0007".
> So, in the password_query, one would need something like:
> 
> 	... WHERE login = '%u' ...
> 
> On the other hand, for receiving mail thru say, LMTP, one would need something like this in the user_query:
> 
> 	... WHERE email = '%Lu' ...

You could make it so that password_query changes the username to email
by selecting "email AS user" and then user_query has only the email='%
Lu'. Or you could make your user_query have "where (email='%Lu' or
user='%u').

> I can't manage to devise a way to systematically refer to users thru their login, nor to avoid such messages:
> 
> 	prefetch(u0007): passdb didn't return userd entries, trying the next userdb

This seems like a different problem to me..