1)   SPAMfighter Exchange Module 3.4.2.6
SPAMfighter Exchange module (SEM) is the easy-to-use anti-spam/virus solution for Microsoft Exchange Server 2000/2003/2007 and Microsoft SBS. SEM delivers instant spam protection with no maintenance. Languages: English, German, Dutch, Spanish, French

 2)   SecurityGateway 1.0
SecurityGateway email spam firewall for Exchange/SMTP Servers protects against viruses, phishing, spoofing, and other malware. Analyze, manage, and report on email traffic patterns. Simple Administration, Powerful Filtering, Accurate Results!

 3)   SecurityGateway for Exchange / SMTP 1.0.5
SecurityGateway email spam firewall for Exchange/SMTP Servers protects against viruses, phishing, spoofing, and other malware. Analyze, manage, and report on email traffic patterns. Simple Administration, Powerful Filtering, Accurate Results!