forgot to reply all.

---------- Forwarded message ---------
From: Larry Rosenman <larryrtx@gmail.com>
Date: Mon, Apr 15, 2019 at 5:58 AM
Subject: Re: SOLR/Index?
To: John Fawcett <john@voipsupport.it>

the local users (myself, my wife, a friend) can authenticate EITHER as <username> or <username>@lerctr.org.

switching to all virtual users is NOT going to happen. 

If I login to roundcube with <user>@lerctr.org it finds the autoindexed mail.

So, if I make everyone always authenticate as <user>@lerctr.org we should be fine.

and change my script to do doveadm -u <user>@<domain> instead of depending on the local user running the cron job. 

question: Is there some way to have dovecot change what it sees to be <user>@lerctr.org when they login as <user>?

Dovecot is very configurable, but it can also take some time, effort and testing to get the configuration you want. Personally I don't mix user types since it takes out an element of complexity.

For your case you might find it useful to look into auth_default_realm

that can specify a domain name when one is not supplied.

https://wiki2.dovecot.org/DomainLost

Other things that might be useful: there is a method for returning a "user" field from the userdb query or passdb query which will change the username. Or there is another setting that can overriding values of fields returned by the userdb.

https://wiki.dovecot.org/UserDatabase

Hope it helps!

John