nb1 writes:  

Apache SpamAssassin 3.3.0 is a mature, wide-spectrum, extensible email filtering package deployed by hundreds of thousands of organizations worldwide.

Apache SpamAssassin 3.3.0 represents a major shift in how SpamAssassin rules (the actual patterns that help to identify spam) are updated. Rules are now separate from the core product and are instead downloaded using "sa-update," SpamAssassin's automatic update software. This method was optional with the 3.2.x series of releases and has proven to be very popular.

SpamAssassin provides a comprehensive set of features and support for methods and standards such as text based patterns, bayesian scoring, DNS based black and white lists, DKIM and SPF sender authentication, and email signature clearing houses. The software utilizes a principle of identifying multiple reasons for classifying an email as spam to improve accuracy and decrease the chance of legitimate emails being incorrectly identified as spam

Go There

nb1 writes:  

Head over to the Apache Software Foundation's website and you'll see an announcement posted by ASF Chairman Jim Jagielski welcoming Facebook as the open-source company's newest sponsor.

"With Open Source in its DNA, Facebook is an enthusiastic champion and active contributor to the ASF, including the Hive subproject of Apache Hadoop, as well as the popular incubating projects Thrift and Cassandra -- all originally developed by Facebook," Jagielski wrote.

Per the announcement, Facebook signed on as a platinum-level sponsor, the highest membership level available and one which requires an annual donation of at least $100,000. Other membership levels include Gold ($40K/year), Silver ($20K/year), and Bronze ($5K/year).

The Apache Software Foundation

These are from the Apache Mod Rewrite Guide. These are killer scripts in my estimation. Enjoy!!

- Time-Dependend Rewriting

Description:
When tricks like time-dependend content should happen, a lot of webmasters still use CGI scripts which do for instance redirects to specialized pages. How can it be done via mod_rewrite?
Solution:
There are a lot of variables named TIME_xxx for rewrite conditions. In conjunction with the special lexicographic comparison patterns <STRING, >STRING and =STRING we can do time-dependend redirects:

RewriteEngine on
RewriteCond %{TIME_HOUR}%{TIME_MIN} >0700
RewriteCond %{TIME_HOUR}%{TIME_MIN} <1900
RewriteRule ^foo.html$ foo.day.html
RewriteRule ^foo.html$ foo.night.html

- Host Deny Using External File

Description:
How can we forbid a list of externally configured hosts from using our server?
Solution:
RewriteEngine on
RewriteMap hosts-deny txt:/path/to/hosts.deny
RewriteCond ${hosts-deny:%{REMOTE_HOST}|NOT-FOUND} !=NOT-FOUND [OR]
RewriteCond ${hosts-deny:%{REMOTE_ADDR}|NOT-FOUND} !=NOT-FOUND
RewriteRule ^/.* - [F]