If you run sendmail, this milter will plug right in.
You don't need to run spfd.
You do, however, need to give the milter an "mx" argument
if your MTA serves as the primary MX for domains which
have secondary MXes that you don't know about. When a
secondary MX relays mail to you, you want to bypass SPF
checks. With an "mx" argument, the milter will look at
Mail::SPF::Query(User Contributed Perl DocumentatMail::SPF::Query(3)
Mail::SPF::Query - query Sender Policy Framework for an
my $query = new Mail::SPF::Query (ip => "127.0.0.1", sender=>'email@example.com', helo=>"somehost.example.com", trusted=>0, guess=>0);
my ($result, # pass ⎪ fail ⎪ softfai