[Dovecot] X.509 certificate based IMAP login

Hello list,

The dovecot version is 1.2.6 running on Solaris x86 11 (nv-b91). The relevant configuration lines are:

passdb ldap { # LDAP database (doc/wiki/AuthDatabase.LDAP.txt.) args = /pfx/etc/dovecot/dovecot-ldap.conf }

The file dovecot-ldap.conf is correct and LDAP authentication is working well.

We would like to make it possible for users with a X.509 client certificate to log in without providing LDAP or any other credentials. Is there something like:

passdb x509 { args = /pfx/etc/dovecot/dovecot-caroots.pem nopwd = yes }

...avaibable, or is there another solution?

Thanks, Brian