courierpassd was written by:
Andrew St. Jean <andrew@arda.homeunix.net>


courierpassd makes use of the Courier authentication 
library written by:
Sam Varshavchik <mrsam@courier-mta.com>

authentication tokens are passed to courierpassd using
the poppassd protocol
poppassd was written by:
Pawel Krawczyk <kravietz@echelon.pl>
based on an earlier version written by:
John Norstad <j-norstad@nwu.edu>,
Roy Smith <roy@nyu.edu> and Daniel L. Leavitt <dll.mitre.org>

