AMaViS: www.amavis.org [1]
Cyrus IMAP Server and Cyrus SASL: asg.web.cmu.edu/cyrus [2]
Linux HA Heartbeat: www.linux-ha.org/heartbeat [3]
IMAP Proxy: www.imapproxy.org [4]
OpenLDAP: www.openldap.org [5]
Postfix: www.postfix.org [6]
Postal: www.coker.com.au/postal [7]
SecuritySage: www.securitysage.com [8]
Silicon Graphics, Inc. XFS: oss.sgi.com/projects/xfs [9]
Spamhaus XBL: www.spamhaus.org/xbl [10]
Spamity: www.collaboration-world.com/spamity [11]
SquirrelMail: www.squirrelmail.org [12]
tm: redbud.cats.ohiou.edu/tm [13]
Links:
[1] http://www.amavis.org
[2] http://asg.web.cmu.edu/cyrus
[3] http://www.linux-ha.org/heartbeat
[4] http://www.imapproxy.org
[5] http://www.openldap.org
[6] http://www.postfix.org
[7] http://www.coker.com.au/postal
[8] http://www.securitysage.com
[9] http://oss.sgi.com/projects/xfs
[10] http://www.spamhaus.org/xbl
[11] http://www.collaboration-world.com/spamity
[12] http://www.squirrelmail.org
[13] http://redbud.cats.ohiou.edu/tm