MIMEDefang is a free email filtering tool released under the GNU General Public License. It works with the Sendmail "Milter" library, and allows user to write filtering policies in Perl rather than C. Using MIMEDefang you can tag spam, add warnings for external mail, block viruses, and much much more. MIMEDefang was first released in 2000. Thanks to AppRiver for donating MIMEDefang to the foundation.
Net::validMX is a Perl module to use DNS and/or regular expressions to verify if an email address could be valid by checking for valid MX records. It can be used for sender verification used with MIMEDefang and/or verifying email addresses when registering users.
The McGrail Foundation is refining a Cybersecurity & IT Administrator 101 Curriculum and Open Source Textbook currently teaching it to interns and college auditors. The curriculum closes a gap in the current cybersecurity teachings by providing a laboratory practicum to provide the crucial practical, hands-on experience to support the success of graduates pursuing cybersecurity careers. Designed as a 16-week lab working with real clients on real-world incident responses, analyzing live data from partner data centers, building an individual cyber range, and learning Ethics/Rules of Engagement/Conflict of Interest handling to solve real problems.
The KAM Ruleset is a set of Apache SpamAssassin rules developed and used on our systems. This ruleset has been in active use and development since May 2004 and provides a significant boost to the performance and efficacy of a stock installation of Apache SpamAssassin.