DisSent (short for "Distribute Sent Mails") is a program for separating your sent mail from a single folder into different folders based on properties of the individual messages in the folder. It scans your mail storage and proposes a set of actions to tidy up your sent mail folders. More precisely, it gives you a list of messages along with proposals on where to move these messages. You can then select the messages you want to move and let DisSent do the actual work.
AqMail fetches mails from remote mailboxes (POP3), applies admin-defined filters, and stores the email in local mailboxes for POP3 daemons to serve them. It supports virtual mail domains and users. It has been tested with QMail as the MTA and with Spamassassin and ClamAV as filters.
libspawner implements the MTA side of Sendmail's Milter (mail filter) protocol that is used by the MTA to delegate policy decisions to external daemons. The main purpose of this library is to enable other MTAs, or any mail-handling software, to talk to the existing mail filters that have been developed for Sendmail.
Sporkie is a challenge/response spam email filter. It uses CAPTCHAs (randomly generated, distorted images of numbers) in order to verify that a person sending email is human. It works in the same manner as the ASK project, except that Sporkie uses CAPTCHAs. The main advantage to using CAPTCHAs is that it catches automated spam bots that don't spoof their email address. With ASK, such bots would get through the system. Sporkie is provided under the OSCL Type-C license.
KK is a very simple PHP script that displays an ASK (Active SPAM Killer) queue and executes ASK queue commands by automatically triggering email messages. It requires the ASK queue to be imported into a MYSQL database, which is achieved with a simple bash script. KK lacks user authentication, as it isn't targeted for large amount of users. Instead, it identifies users by using a simple numeric code. This may be improved in future releases.
Poprox is a POP3 and SMTP transparent filtering proxy. It does virus scanning using libclamav and is comparable to p3scan in philosophy. Its design is based on a multi-process architecture which allows the detection of libclamav crashes. When this occurs, Poprox is able to delete the offending mail. Debug mode can be toggled by sending a SIGUSR1 signal to the main process. Interactions with users can be translated in any language by using a simple template system.