On Thursday, April 11, 2019 2:02 PM, Aki Tuomi <aki.tuomi at open-xchange.com> wrote: > PAM is trying to lookup user at domain while you probably only have user. PAM driver does not yet support username_format. > > Aki But /etc/dovecot/users file isn't pam ? I don't need pam if if I'm using /etc/dovecot/users ? Or am I understanding you wrong?