Not much to do to get this to work.
Copy one of the "mail_dshield.pl" scripts
into a suitable directory.
Configure EITHER smtp or a sendmail equivalent.
Set your DShield UserID, and mail address
Adjust the PATH to the dshield cache directory, it
should be the same as what you've configured for the
LaBrea::Tarpit::daemon.
Run periodically from cron, it's smart enough to delete
its old files and hang on to the ones that don't get
sent for a retry.