Email Secretary is a Challenge/Response system designed to deter spam.
Written entirely in Perl, it is highly configurable and easy to modify.
It has a Web GUI to manage your whitelists, blacklists, and pending
messages.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
This release finishes "sort by date" in the SGI, adds a vacation option in the CGI, changes the "sendmail" call to "forward", and remembers the sorting field in the CGI. The whitelist button also approves applicable pending messages.