Postfix-policyd-spf-perl is a project mainly written in Perl, it's free.
For of postfix-policyd-spf-perl with domains whitelists
This is a fork of postfix-policyd-spf-perl (https://launchpad.net/postfix-policyd-spf-perl/). This forks adds the option of working with Domains white lists.
Any Question to me [email protected]