dovecot conf, playing nice with postfix in debian wheezy

dovecot.conf

listen = *, [::]
log_timestamp = "%Y-%m-%d %H:%M:%S "
mail_location = maildir:~/.mail
mail_privileged_group = mail
maildir_very_dirty_syncs = yes
passdb {
  driver = pam
}
protocols = imap pop3
service auth {
  unix_listener /var/spool/postfix/private/auth-client {
    group = postfix
    mode = 0660
    user = postfix
  }
  user = root
}
service imap-login {
  inet_listener imap {
    port = 0
  }
}
service pop3-login {
  inet_listener pop3 {
    port = 0
  }
}
ssl_cert = </etc/ssl/private/dovecot.pem
ssl_key = </etc/ssl/private/whetever.key
userdb {
  driver = passwd
}
protocol imap {
  mail_max_userip_connections = 16
}
protocol pop3 {
  pop3_uidl_format = %08Xu%08Xv
}