dkimsign - Script for DKIM signing messages on stdin
dkimsign is a filter that reads an RFC822 message on standard input,
and writes the same message on standard output with a DKIM-Signature
The signing options are specified on the command line:
dkimsign selector domain privatekeyfile [identity]
The identity is optional and defaults to "@domain".
This version of dkimsign was written by Greg Hewgill
This man-page was created by Scott Kitterman <email@example.com> and
is licensed under the same terms as pydkim.