[Dovecot] proxy and master user

Hi

For some application we need a master user on our IMAP servers. We use dovecot 1.1.7 in proxy mode, with proxy_maybe (some mailboxes are on the proxy itself, others are on remote servers, also running dovecot).

But the proxy removes the '*master' suffix from the username when using the master user to log in on the proxy. So the base name of the user with the master password are submitted to the real server, which of course fails.

Is there a way to tell the proxy to forward the master user to the real server, without forcing it in destuser, since we also need to have regular (non master) logins?

Thanks in advance.

Matthieu Herrb