j-chkmail is a mail filtering software using sendmail milter API. j-chkmail is compatible with UNIX based mailservers running sendmail or postfix.

The goal of j-chkmail is to be able to filter as much messages as possible, as fast as possible and as well as possible. Originally, it's intended to be use in large and heterogeneous communities such as university campus, but not only.

It's a complete and integrated solution including both behavioural filtering (connection rate control, detection of suspicious behaviour, greylisting , black and white DNS based lists...) and content filtering (statistical/bayesian content filtering, pattern matching, URL filtering and heuristic filtering).

To detect viruses j-chkmail can use an external message content scanner (Clamd) or simply checking attached file names against preconfigured file extensions of regular expressions.

Some command line tools are included allowing mail admins to get real time information about the filter (counters, statistics, …) without needing to grep log files (which is also available). Modification of many configuration options is possible without stop/starting the filter.

Basic message archiving can be done based on SMTP client address or the (envelope) email address of the sender or recipient.

j-chkmail is compatible IPv6.

http://j-chkmail.ensmp.fr/

-- JoseMarcioMartins - 20 Jul 2008

</center-->