# /etc/dovecot.conf
protocols: imaps
login_dir: /var/run/dovecot/login
login_executable: /usr/libexec/dovecot/imap-login
login_process_size: 64
auth default:
  mechanisms: plain login
  verbose: yes
  debug: yes
  debug_passwords: yes
  passdb:
    driver: pam
  userdb:
    driver: passwd

#%PAM-1.0
auth       required     pam_nologin.so
auth       include      system-auth
account    include      system-auth
session    include      system-auth