[Dovecot] pam_authenticate() failed

[Martijn de Munnik]

Hi List,

I have a problem with auth for just one user:

dovecot: Sep 30 09:56:16 Info: auth(default): new auth connection:
pid=3809
dovecot: Sep 30 09:56:17 Info: auth(default): client in: AUTH   1      
PLAIN   service=IMAP    secured lip=127.0.0.1   rip=127.0.0.1  
resp=AGoucnVpc0BtZXJreC12ZXJrZXJrLm5sAGJsb2VtMDEh
dovecot: Sep 30 09:56:17 Info: auth(default):
pam(j.ruis at merkx-verkerk.nl,127.0.0.1): lookup service=dovecot
dovecot: Sep 30 09:56:17 Info: auth(default):
pam(j.ruis at merkx-verkerk.nl,127.0.0.1): pam_authenticate() failed:
Authentication failed
dovecot: Sep 30 09:56:18 Info: auth(default): client out: FAIL  1      
user=j.ruis at merkx-verkerk.nl
dovecot: Sep 30 09:56:18 Info: imap-login: Disconnected:
user=<j.ruis at merkx-verkerk.nl>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1,
secured

this login attempt is done via webmail but also connections with mail
clients fail.

other users can login successful:

dovecot: Sep 30 09:58:36 Info: auth(default): client in: AUTH   1      
PLAIN   service=IMAP    secured lip=127.0.0.1   rip=127.0.0.1   resp=AG1
hcnRpam5AeW91bmdndW5zLm5sADZtdW5zaG9l
dovecot: Sep 30 09:58:36 Info: auth(default):
pam(martijn at youngguns.nl,127.0.0.1): lookup service=dovecot
dovecot: Sep 30 09:58:36 Info: auth(default): client out: OK    1      
user=martijn at youngguns.nl
dovecot: Sep 30 09:58:36 Info: auth(default): master in: REQUEST        72
    4119    1
dovecot: Sep 30 09:58:36 Info: auth(default):
passwd(martijn at youngguns.nl,127.0.0.1): lookup
dovecot: Sep 30 09:58:36 Info: auth(default): master out: USER  72     
martijn at youngguns.nl    system_user=martijn at youngguns.nl        uid=1063
        gid=1062        home=/home/youngguns.nl/homes/martijn
dovecot: Sep 30 09:58:36 Info: imap-login: Login:
user=<martijn at youngguns.nl>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1,
secured
dovecot: Sep 30 09:58:36 Info: IMAP(martijn at youngguns.nl): Loading modules
from directory: /opt/csw/lib/dovecot/imap
dovecot: Sep 30 09:58:36 Info: IMAP(martijn at youngguns.nl): Module loaded:
/opt/csw/lib/dovecot/imap/lib90_antispam_plugin.so
dovecot: Sep 30 09:58:36 Info: IMAP(martijn at youngguns.nl): Effective
uid=1063, gid=1062, home=/home/youngguns.nl/homes/martijn
dovecot: Sep 30 09:58:36 Info: IMAP(martijn at youngguns.nl): maildir:
data=/home/youngguns.nl/homes/martijn/Maildir
dovecot: Sep 30 09:58:36 Info: IMAP(martijn at youngguns.nl): maildir:
root=/home/youngguns.nl/homes/martijn/Maildir,
index=/home/youngguns.nl/home
s/martijn/Maildir, control=, inbox=
dovecot: Sep 30 09:58:36 Info: IMAP(martijn at youngguns.nl): Disconnected:
Logged out

How can I determine why pam_authenticate() failed?

output of dovecot -n:

# 1.0.13: /opt/csw/etc/dovecot.conf
log_path: /var/log/dovecot.log
info_log_path: /var/log/dovecot.info.log
protocols: imap pop3 imaps pop3s
listen(default): *
listen(imap): *
listen(pop3): *:110
ssl_cert_file: /opt/csw/ssl/secure-youngguns-nl.crt
ssl_key_file: /opt/csw/ssl/secure-youngguns-nl.key
disable_plaintext_auth: no
verbose_ssl: yes
login_dir: /opt/csw/var/run/dovecot/login
login_executable(default): /opt/csw/libexec/dovecot/imap-login
login_executable(imap): /opt/csw/libexec/dovecot/imap-login
login_executable(pop3): /opt/csw/libexec/dovecot/pop3-login
login_greeting: Welkom bij de YoungGuns postbode.
mail_location: maildir:~/Maildir
mail_debug: yes
mail_executable(default): /opt/csw/libexec/dovecot/imap
mail_executable(imap): /opt/csw/libexec/dovecot/imap
mail_executable(pop3): /opt/csw/libexec/dovecot/pop3
mail_plugins(default): antispam
mail_plugins(imap): antispam
mail_plugins(pop3):
mail_plugin_dir(default): /opt/csw/lib/dovecot/imap
mail_plugin_dir(imap): /opt/csw/lib/dovecot/imap
mail_plugin_dir(pop3): /opt/csw/lib/dovecot/pop3
pop3_uidl_format(default):
pop3_uidl_format(imap):
pop3_uidl_format(pop3): %v.%u
auth default:
  mechanisms: login plain
  verbose: yes
  debug: yes
  debug_passwords: yes
  passdb:
    driver: pam
  userdb:
    driver: passwd
  socket:
    type: listen
    client:
      path: /opt/csw/var/spool/postfix/private/auth
      mode: 432
      user: postfix
      group: postfix
plugin:
  antispam_trash: Trash;trash;TRASH
  antispam_spam: spam
  antispam_mail_tmpdir: /tmp
  antispam_mail_sendmail: /opt/csw/bin/sa-learn
  antispam_mail_sendmail_args:
  antispam_mail_spam: --spam
  antispam_mail_notspam: --ham

--

thanks,
Martijn