Signs/verifies Internet mail with DKIM/DomainKey signatures
Mail-DKIM is a Perl module that implements the new Domain Keys
Identified Mail (DKIM) standard, and the older Yahoo! DomainKeys
standard, both of which sign and verify emails using digital signatures
and DNS records. Mail-DKIM can be used by any Perl program that wants
to provide support for DKIM and/or DomainKeys.