Mail::SPF is an object-oriented Perl implementation of the Sender Policy Framework (SPF) e-mail sender authentication system . . It supports both the TXT and SPF RR types as well as both SPFv1 (v=spf1) and Sender ID (spf2.0) records, and it is fully compliant to RFCs 4408 and 4406. (It does not however implement the patented PRA address selection algorithm described in RFC 4407.)
