Turn on auth_verbose=yes and auth_debug=yes and post logs.



---
Aki Tuomi
Dovecot oy

-------- Original message --------
From: Anushka Bandara <anushkab@opensource.lk>
Date: 10/07/2018 08:53 (GMT+02:00)
To: dovecot@dovecot.org
Subject: Authentication failure with OpenLDAP

Hi all,

Dovecot version: 2.2.22 (fe789d2)
Ubuntu version: 16.04
OpenLDAP version: openldap-2.4.42+dfsg

Configurations

# 2.2.22 (fe789d2): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.4.13 (7b14904)
# OS: Linux 4.10.0-28-generic x86_64 Ubuntu 16.04.3 LTS
disable_plaintext_auth = no
listen = *
log_path = /var/log/dovecot.log
mail_location = maildir:~/Maildir
namespace inbox {
  inbox = yes
  location =
  mailbox Drafts {
    special_use = \Drafts
  }
  mailbox Junk {
    special_use = \Junk
  }
  mailbox Sent {
    special_use = \Sent
  }
  mailbox "Sent Messages" {
    special_use = \Sent
  }
  mailbox Trash {
    special_use = \Trash
  }
  prefix =
}
passdb {
  args = /etc/dovecot/dovecot-ldap.conf.ext
  driver = ldap
}
protocols = pop3 imap
service auth {
  unix_listener /var/spool/postfix/private/auth {
    mode = 0666
  }
}
ssl = no
userdb {
  args = /etc/dovecot/dovecot-ldap.conf.ext
  driver = ldap
}

I am having "Authentication failed" problem with dovecot-ldap. Before it, I had binding error and I fixed it. Now I am having authentication problem when I am trying to log dovecot (usign telnet localhost 110) using a user which is created in ldap server. I can provide any configuration file and I did this configurations according to this "https://help.ubuntu.com/community/DovecotLDAP".
Now I am having an authentication error.

Thank you