[Dovecot] Sieve not working

[Christoph Pleger]

Hello,

I installed dovecot 2.0.6 and pigeonhole 0.2.1 on my system, but I guess that 
sieve is not working, because netstat does not show that anything is listening 
to ports 2000 and 4190.

Regards
  Christoph

# 2.0.6 (601065674f74): /etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-bpo.5-amd64 x86_64 Debian 5.0.6
auth_mechanisms = plain login
disable_plaintext_auth = no
first_valid_uid = 122
last_valid_uid = 122
mail_gid = vmail
mail_location = mdbox:~/mdbox
mail_uid = vmail
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
passdb {
  args = scheme=MD5-CRYPT username_format=%Ln /etc/dovecot/users
  driver = passwd-file
}
plugin {
  sieve = ~/.dovecot.sieve
  sieve_dir = ~/sieve
}
protocols = imap lmtp
service auth {
  unix_listener /var/spool/postfix/private/auth {
    group = postfix
    mode = 0660
    user = postfix
  }
}
service imap-login {
  inet_listener imap {
    port = 0
  }
  inet_listener imaps {
    port = 993
    ssl = yes
  }
}
service lmtp {
  unix_listener /var/spool/postfix/private/dovecot-lmtp {
    group = postfix
    mode = 0660
    user = postfix
  }
}
service managesieve-login {
  inet_listener sieve {
    port = 4190
  }
  inet_listener sieve_deprecated {
    port = 2000
  }
}
ssl_cert = </etc/ssl/certs/dovecot.pem
ssl_key = </etc/ssl/private/dovecot.pem
userdb {
  args = username_format=%Ln /etc/dovecot/users
  driver = passwd-file
}
protocol lmtp {
  mail_plugins = " sieve"
}