[Dovecot] Director and CRAM-MD5

Hello,

i have a setup with two director servers pointing to two backends. I don't care that much for load balancing, my main goal is high availability.

CRAM-MD5 auth is working fine if I connect directly to the backends, but the director only supports AUTH=PLAIN because of the static passdb.

director config:

passdb { driver = static args = nopassword=y proxy=y }

director_servers = director1 director2 director_mail_servers = backend1 backend2

backend config:

passdb { driver = vpopmail args = }

userdb { driver = vpopmail }

It seems that the director is only working, if I use the static passdb?!

How can I use the director with other passdb drivers than the static one?

Greetings, Martin