I did that and restarted postfix. I think it is looking for a database, not a text file. Am I missing something ?
Apr 24 17:02:19 mydomain postfix/master[8542]: daemon started -- version 2.7.1, configuration /etc/postfix
Apr 24 17:03:27 mydomain postfix/smtpd[8553]: fatal: open database /etc/postfix/recipient_access.db: No such file or directory
Apr 24 17:03:28 mydomain postfix/master[8542]: warning: process /usr/lib/postfix/smtpd pid 8553 exit status 1
Apr 24 17:03:28 mydomain postfix/master[8542]: warning: /usr/lib/postfix/smtpd: bad command startup -- throttling