Samba has pam_smbpass which is a PAM module that hooks into password changing, and changes the users' samba password (presumably used for NTLM auth?), when the users change their ordinary unix/linux password. http://gitweb.samba.org/?p=samba.git;a=tree;f=source3/pam_smbpass;h=c230a1b2...

It shouldn't bee too hard to take the code from here, combine it with dovecotpw and create a PAM module that changes the dovecot password in a way that can be used for cram-md5.

Ideally it should read the /etc/dovecot/dovecot.conf (whereever it is), and find the path of the passwd-file and use that.

Has anyone else looked into doing something like this?