protocol managesieve {
  listen = *:4190, [::]:4190
}
[...]
protocol managesieve {
  [...]
  # If, for some inobvious reason, the sieve_storage remains unset, the
  # ManageSieve daemon uses the specification of the mail_location to find out
  # where to store the sieve files (see explaination in README.managesieve).
  # The example below, when uncommented, overrides any global mail_location
  # specification and stores all the scripts in '~/mail/sieve' if sieve_storage
  # is unset. However, you should always use the sieve_storage setting.
  # mail_location = mbox:~/mail
  mail_location = maildir:/home/vmail/%d/%n/Maildir
}

service managesieve-login {
  inet_listener sieve {
    port = 4190
  }

  #inet_listener sieve_deprecated {
  #  port = 2000
  #}
[...]
}