[Dovecot] auth: passwd file (info): unknown user

[Jim Knuth]

Hello,

the problem is: The users are system users (by Confixx) say webxpy.
But behind it e-mail puts of course address like
info at domain.de and so on. Everything functions perfectly,
nevertheless, is following in the log.

…
… dovecot: auth: passwd file (jk): unknown user
… dovecot: auth: passwd file (jim.knuth): unknown user
… dovecot: auth: passwd file (info): unknown user
… and so on

It is tried obviously, before the domain part in the passwd file
to find user info … However, there is in it only webxpy.
How can I solve this dilemma, by which does this come then?

auth_username_format = %n

Thanks in advance

as attached mine dovecot-n

-- 
Mit freundlichen Grüßen,
with kind regards,
Jim Knuth

-------------- next part --------------
# 2.2.0 (bafcb428167b): /etc/dovecot/dovecot.conf
# OS: Linux 2.6.29.4-default i686 Debian 7.0 
auth_master_user_separator = *
auth_mechanisms = plain login
auth_username_format = %n
auth_verbose = yes
auth_worker_max_count = 50
disable_plaintext_auth = no
listen = *
login_greeting = Mailserver ready.
managesieve_notify_capability = mailto
managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date
namespace inbox {
  inbox = yes
  list = yes
  location = maildir:~/Maildir
  mailbox Ablage {
    auto = subscribe
  }
  mailbox Drafts {
    special_use = \Drafts
  }
  mailbox Entwurf {
    auto = subscribe
    special_use = \Drafts
  }
  mailbox Gesendet {
    auto = subscribe
  }
  mailbox Junk {
    special_use = \Junk
  }
  mailbox Papierkorb {
    auto = subscribe
    special_use = \Trash
  }
  mailbox Sent {
    special_use = \Sent
  }
  mailbox "Sent Messages" {
    special_use = \Sent
  }
  mailbox Spam {
    auto = subscribe
    special_use = \Junk
  }
  mailbox Trash {
    special_use = \Trash
  }
  prefix = 
}
passdb {
  args = username_format=%n
  driver = pam
}
plugin {
  quota = maildir:User quota
  quota_grace = 5%%
  quota_status_nouser = DUNNO
  quota_status_overquota = 552 5.2.2 Sorry, but Mailbox is full|Mailbox ist voll
  quota_status_success = DUNNO
  sieve = ~/.dovecot.sieve
  sieve_before = /etc/dovecot/sieve/global/global.sieve
  sieve_dir = ~/sieve
  sieve_global_dir = /etc/dovecot/sieve/global/
  sieve_global_path = /etc/dovecot/sieve/global/global.sieve
  trash = /etc/dovecot/dovecot-trash.conf.ext
}
postmaster_address = postmaster at art-domains.de
protocols = imap pop3 lmtp sieve
service auth {
  unix_listener /var/spool/postfix/private/auth {
    group = postfix
    mode = 0660
    user = postfix
  }
  unix_listener auth-master {
    mode = 0600
  }
}
service imap-login {
  client_limit = 128
  process_limit = 256
  service_count = 0
  vsz_limit = 64 M
}
service lmtp {
  unix_listener /var/spool/postfix/private/dovecot-lmtp {
    group = postfix
    mode = 0660
    user = postfix
  }
}
service managesieve-login {
  inet_listener sieve {
    port = 4190
  }
  service_count = 1
  vsz_limit = 64 M
}
service pop3-login {
  client_limit = 128
  process_limit = 256
  service_count = 0
  vsz_limit = 64 M
}
service quota-status {
  client_limit = 1
  executable = quota-status -p postfix
  inet_listener {
    address = 127.0.0.1
    port = 12340
  }
}
ssl_cert = </etc/dovecot/certs/dovecot.pem
ssl_key = </etc/dovecot/private/dovecot.pem
userdb {
  args = username_format=%n /etc/dovecot/passwd.quota
  driver = passwd-file
}
verbose_proctitle = yes
protocol sieve {
  mail_max_userip_connections = 10
  managesieve_implementation_string = Dovecot Pigeonhole
  managesieve_logout_format = bytes=%i/%o
  managesieve_max_compile_errors = 5
  managesieve_max_line_length = 65536
}
protocol imap {
  imap_client_workarounds = 
  mail_fsync = never
  mail_plugins = " quota imap_quota trash"
}
protocol pop3 {
  mail_fsync = never
  mail_plugins = " quota trash"
  pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
  pop3_lock_session = yes
  pop3_uidl_format = %v-%u
}
protocol lda {
  mail_fsync = optimized
  mail_plugins = " quota sieve trash"
  postmaster_address = postmaster at art-domains.de
}
protocol lmtp {
  mail_plugins = " quota sieve trash"
}