BLD stands for "blacklist daemon" and is intended to serve a blacklist. The blacklist is built by simply inserting IP addresses or by using submission rate limits based on a maximum number of submissions of the same IP address within a minimum time interval. A BLD cluster can be built by configuring the daemon to notify other similar daemon(s) every time an IP address is added to the blacklist. BLD was primarily designed to fight against dictionary-based spam (by making the MTA report to BLD any host that tries to send email to an unknown user), but can be used by any program.
BarricadeMX provides very accurate, high performance spam and virus protection for Enterprise and ISP sites. Features include simple installation and administration, little if any end user interaction required, no quarrantine required, and an optional custom non-delivery receipt for all rejected messages. It uses a custom version of SpamAssassin along with many proprietary anti-spam techniques to achieve a guaranteed level of over 99% accurate spam detection with fewer than 0.1% false positives.
BASP (BAsh Server Pages) is a patch against Bash for processing HTML templates (or any documents) with embedded shell scripts. The advantage is that you have full access to the shell and system environment without learning yet another programming language. This project has been merged with BashDiff.
This is a mail filter which uses the Bayes algorithm as explained in Paul Graham's article "A Plan for Spam". It aims to be smaller, faster, and more versatile than other filters. The implementation is ANSI C and uses POSIX functions. Supported platforms are (in theory) all POSIX systems. It is independent from external programs and libraries, supports multiple database formats (flat files, libdb, and MySQL), and uses efficient zero-copy processing. SpamAssassin style passthru mode and headers are supported.
libbnr is an implementation of the Bayesian Noise Reduction (BNR) algorithm. All samples of text contain some degree of noise (data which is either intentionally or unintentionally irrelevant to accurate statistical analysis of the sample where removal of the data would result in a cleaner analysis). The Bayesian noise reduction algorithm provides a means of cleaner machine learning by providing more useful data, which ultimately leads to better sample analysis. With the noisy data removed from the sample, what is left is only data relevant to the classification. libbnr can be linked in with your classifier and called using the standard C interface.
Bayesian Pattern Filtering Library is a general purpose library designed for building Bayesian Filters. Its primary purpose is to provide an easy-to-use interface to allow the building of Bayesian filters regardless of the data being analyzed. A user will only need to provide a tokenizer, hash function, and comparison function in order to build a Filter.
BitDefender Mail Protection is a powerful mail filtering solution that provides antivirus and antispam capabilities to Linux mail servers. Both sent and received messages are scanned in real-time, avoiding possible infections and preventing anyone from sending an infected message. It claims a 100% detection rate for all viruses in the wild through its powerful scanning engines, which are certified by prestigious testing labs.
BlackMamba is a semi-automatic spam filter and email previewer. It lets you connect to your POP3 mail server and peek into your mailbox. BlackMamba automatically categorizes the messages as "friendly", "possible spam", and "spam" based on a few simple configuration steps. It allows you to delete the messages, and it maintains an address book, a list of spammers, and a mail size filter. It should be useful if you've gone on a holiday and haven't checked your email for weeks and know that your mailbox will be full of junk. BlackMamba sorts your email messages without downloading the messages in their entirety.