[Dovecot] Problem with DIGEST-MD5 authentication and plaintext passwords

I wasn't able to get DIGEST-MD5 authentication working with passwords stored as plaintext until I tweaked password_generate() to make it not use the domain portion of user@domain.com as the realm. Both evolution and kmail send the email address as the username with no realm; when dovecot tries to convert the username to user + realm, the hash is different and so DIGEST-MD5 authentication fails. Having password_generate() hash user@domain.com::password instead of user:domain.com:password fixes it. I need this to work because I need to support all of PLAIN, CRAM-MD5, and DIGEST-MD5 at the same time.

Timo, do you think this is a proper fix, or are kmail and evolution broken?

Matt