A generic filter "front end" that does the following: reads standard input and sends it through a socket to a specified host and port number; receives data back from the socket and writes it to standard output.
Vipul's Razor is a distributed, collaborative, spam detection and filtering
network. The primary focus of the system is to identify and
disable an email spam before its injection and processing
is complete.
The program implements the CIDR merging with whitelisting (network exclusion). Output will be summarized to be as small as possible. The program has been widely used for blacklist merge and optimization.
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Penny Post is a system to combat spam emails by making the sender "pay for email" by spending a few seconds of computing time. Outgoing mail is marked with postage stamps that convince the receiver that the sender is genuine.
This is a collection of Perl scripts that can be used within dot-qmail(5) configurations. This collection extends the set of utilities which are part of the qmail package by Dan J. Bernstein and follows the conventions of qmail-command(8).
Amber - a "grey list" for Qmail. Amber sits in the tcpserver chain, not accepting or rejecting mail but deferring connections from new IP addresses for some time (default five minutes) before it starts accepting mail from them.
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Pardus (Linux distribution) has its own package manager named Pisi. Pilonga automatically downloads Gentoo ebuild files and converts to Pisi source files.
TIOCU - Trivial Instruments Of Computer User. The goal of the project is to write programs for advanced users to help them automate everyday work. Much attention is paid to documenting the sources to allow quick application in other projects.
GSR is a program to relay local SMTP traffic through a user’s GMail account. If you are behind an ISP that no longer allows SMTP traffic, GSR will allow you to relay your servers SMTP traffic through your GMail account for remote deliver.
Simscan enables qmail to reject viruses, spam, and block attachments during the SMTP conversation so the email never makes it into your email server. Supports ClamAV, SpamAssassin, DSpam and other virus scanners. Very efficient and written in C.
SpamAssassin for Win32 is a free and powerful anti-spam filter for Windows. Includes a resident daemon for mail servers and a user-friendly personal spam filter that works with any POP3 account and any email client.
Zimbra is an open source server and client technology for next-generation enterprise messaging and collaboration. Please see www.zimbra.com for the latest news and downloads.
FakeSMTPServer is a solution for testing web-based products that require a "unique" email address. Instead of being a "real" smtp server, this server forwards all email to a single email address, or can output them to the console instead.
SyWiCo is a tool for managing concurrent modifications of shared files between unconnected computers. It can be used as a synchronization tool relying on email.
Steganography program. Crypture encrypts (1024 bit key) and stores files in Windows bitmap files. Only 6 KB, with no install required. Fills all bits with noise, to slip by standard steganalysis methods. Data header is encrypted and scattered as well.
This program is a minimal SMTP client that takes an email
message body and passes it on to a SMTP server (default is the
MTA on the local host). Since it is completely self-supporting,
it is especially suitable for use in restricted environments.