postfix a smtpd_recipient_restrictions

[mar.don na seznam.cz]

Ahoj,

snazim se v postfixu omezit prichozi spamy a do main.cf
jse si pripadala

smtpd_recipient_restrictions =
  warn_if_reject reject_unknown_sender_domain,
  permit

ale v logu se mi objevuje

fatal: paremater "smtpd_recipient_restrictions": specify at least aone
working instance of: check_relay_domains reject_unauth_domains reject
defer or defer_if_permit

v cem je problem?