HELO rejection

I'm getting this on some hostnames:
"Helo command rejected: Host not found"

And I wanted to clear one for access.

I created a file (/etc/postfix/helo) that has in it:

..domain.com OK

did my little postmap thing and added the following to main.cf:

smtpd_helo_restrictions = permit_mynetworks
check_helo_access hash:/etc/postfix/helo
reject_invalid_hostname
reject_non_fqdn_hostname
reject_unknown_hostname


But it doesn't seem to pick it up.
Any suggesions on what I did wrong?