i cant seem to get dovecot tostart and i have this as the error

Sep 24 18:11:10 coldtouch24 postfix/smtpd[28552]: fatal: parameter "smtpd_recipient_restrictions": specify at least one working instance of: check_relay_domains, reject_unauth_destination, reject, defer or defer_if_permit
Sep 24 18:11:11 coldtouch24 postfix/master[18628]: warning: process /usr/lib/postfix/smtpd pid 28552 exit status 1
Sep 24 18:11:11 coldtouch24 postfix/master[18628]: warning: /usr/lib/postfix/smtpd: bad command startup -- throttling

anyideas