Yuck, I hate writing documentation. You get what you pay for, though. I intend to do a full documentation set starting with version 0.80. Starting with version 0.79, the canonifiers are much more conformant to the DomainKeys draft. Mail::DomainKeys now passes the DomainKeys canonifier torture tests available here: http://sourceforge.net/project/showfiles.php?group_id=107680&package_id=148819 Be aware that DomainKeys is going out of fashion; it appears that DKIM may be its successor. It's still up in the air, though, as far as I can tell. Installation is ala mode: perl Makefile.PL make make test make install Please send bug reports to . Sign them with DomainKeys if possible. :) Please include the version numbers of the following modules: Crypt::OpenSSL::RSA Mail::Address MIME::Base64 Net::DNS Text::Wrap Thanks!