Free email filters software for linux

Mailfilter is a flexible utility for Unix (-like) operating systems to get rid of unwanted spam mails, before having to go through the trouble of downloading them into the local computer. Mailfilter offers support for one or many POP accounts and is especially useful for dialup connections via modem, ISDN, etc.
Mailfilter connects to any POP mail box and compares part of its content to a set of user defined filter rules. That way the spam gets deleted directly on the mail server.
With Mailfilter you can define your own filters (rules) to determine which e-mails should be delivered and which are considered waste. Rules are regular expressions, so you can make use of familiar options from other mail delivery programs such as e.g. procmail.
Mailfilter is released under the terms of the GNU General Public License. For more information, see the README and COPYING documents provided with the Mailfilter program.
Main features:
- Checks one or many POP accounts for spam and other unwanted e-mails, before you have to download the junk
- Very flexible configuration of filter rules to determine spam
- Very flexible configuration of friends lists to determine friendly e-mails
- Mailfilter does not interfere with your current e-mail environment as it is an independent application
- Works especially well as stand-alone application, as a cron job, or with programs like fetchmail
- Keeps log files of deleted message headers
- Available in different languages (English, French, German, Italian, Polish, Portuguese, Russian, Spanish)
- Its small, efficient and runs on many different platforms
- Its free and open
Enhancements:
- Code overhaul to introduce a more object oriented design
- Temporarily disabled gettext and the outdated translations
- (Hopefully) fixed bugs #238273 and #238273 in Debian bug database

Email Files Thunderbird is a very simple service menu script, to email one or more files with Thunderbird to any address or to a given address, which i assume is used as a "backup" space.

The subject is automatically updated according to the attached files and, in case you choose to send to your specific email address, details about sending date, user and host are automatically added in the body.

There are other similar service menus around, but i wanted a script that allows to attach more than one file at one time and that automatically updates the subject line.

USAGE: pretty straightforward.. Just make the two .sh files executable (if necessary) and place them in a directory of your path, for example /home/YOUR_USERNAME/bin. Place the service menu file EmailWithThunderbird.desktop in /home/YOUR_USERNAME/.kde/share/apps/konqueror/servicemenus

IMPORTANT: In file EmailWithThunderbirdToMyAddress.sh, you need to specify your email address in to=.... (that is, where i wrote: YOUR_EMAIL_ADDRESS@DOMAIN.NAME)

This project was tested on OpenSuSE 10.2, KDE 3.5.6

Compact Filter is a network packet filter for Linux. It features an easy-to-use compact filter representation and high performance.
The main features are: easy to use interface, compact filter representation (memory efficient), and very high performance.
A difference between CF and other firewalls, such as Netfilter, is its representation of the ruleset. In CF the user writes a filter which is then compiled and optimized in user-space. The optimized filter is then loaded into the kernel (using netlink). Consequently the in kernel packet filtering code only needs funtionality for setting up a filter and filtering packets, while the more complex code of optimizing the filter remains in user-space.
Because of the continuous increase of the bandwidth and the security threats, firewalls have to evolve towards more efficient filtering schemes. The truth is that the existing scheme does not scale so well with the combined growth of bandwidth and rulesets.
Our aim is to try another approach to perform packet filtering where we minimize the complexity of the filtering process. This result in, both, a reduction of the required CPU power to filter packets and a simpler (and smaller) kernel code. Of course, we are pushing all the smart and complex part out to the user-space, but, developing in user-space is much simpler and safer.
Enhancements:
- changed -d option to delete all filters
- added -D option to delete a specific filter
- changed default policy to permit rather than deny
- added -l option on flex to support --yylineno on older versions of flex
- new and improved install guide

Inline::Filters Perl module contains common source code filters for Inline Modules.

Inline::Filters provides common source code filters to Inline Language Modules. Unless youre an Inline module developer, you can just read the next section.

Supported Filters

This section describes each filter in Inline::Filters.

Strip_POD

Strips embedded POD from a block of code in any language. This is implemented as a regular expression:

$code =~ s/^=w+[^n]*nn(.*?)(^=cutnn|Z)//gsm;

That means if you have a language which contains POD-like syntax, it will be stripped by this filter (i.e. dont use this filter with such a language). This filter is useful for making code like this compile:

use Inline C =><<less