Hi; I installed latest dovecot version (2.0.13) and qmail pathed with qmail-ldap on our systems. We want to use auth_dovecot binary authentication for dovecot. My dovecot config is following: auth_debug = yes auth_debug_passwords = yes auth_verbose = yes base_dir = /var/run/dovecot disable_plaintext_auth = no first_valid_gid = 100 first_valid_uid = 100 last_valid_gid = 65000 last_valid_uid = 65000 listen = * mail_debug = yes mail_location = maildir:~/Maildir mmap_disable = yes protocols = imap pop3 service auth { executable = /opt/surmail/smtp/bin/auth_dovecot ./Maildir unix_listener auth-userdb { group = qmail user = root } } service imap-login { inet_listener imap { port = 143 } } service pop3-login { inet_listener pop3 { port = 110 } } ssl = no verbose_proctitle = yes But, unfortunately I can not connect port 110 via telnet and i'm getting following error: Jun 13 17:11:43 sms dovecot: master: Error: service(auth): child 31580 returned error 111 Jun 13 17:11:43 sms dovecot: master: Error: service(auth): command startup failed, throttling What can be the problem? Regards.. -------------------------------- *Aydin Demirel Endersys Ltd. Sistem Destek Muhendisi / System Support Engineer * Phone : +90 216-4709423 Fax : +90 216-4709508 | Web : http://www.endersys.com.tr <http://www.endersys.com.tr/> Blog : http://blog.endersys.com <http://blog.endersys.com/> Twitter : http://www.twitter.com/endersys LPI : The #1 Linux Certification for IT Professionals LPI (Linux Professional Institute) Turkey http://www.lpi-turkey.com <http://www.lpi-turkey.com/> Endersys is the first Advanced Business partner of Red Hat in Turkey ! http://www.europe.redhat.com/partners/endersys/