Hexamail Guard
Hexamail Guard
http://www.hexamail.com/hexamailguard/?referrer=g-hgc1
GFI MailEssentials
Gfi mailessentials is an anti spam filter for microsoft exchange server, which includes anti-phishing and exchange disclaimer features.
http://www.gfi.com/mes/
IHateSpam for Exchange
Award winning anti-spyware, anti-malware and email security software for home, smb and enterprise. protect your personal information and remove spyware, malware, filter spam, block viruses, and defend your pc or your network.
http://www.sunbelt-software.com/product.cfm?id=931
MailFender
Maildisclaimer lets you add disclaimers in exchange server based on a set of rules and templates that you control.
http://www.mailfender.com/
Pinjo Revealer
Pinjo revealer, spamfilter technology
http://www.pinjo.nl/
XWall Spam Filter
Xwall the advanced spam mail filter for microsoft exchange servers and other smtp based e-mail servers. the xwall email control system goes far bejond a spam filter.
http://www.emailprofessor.com/xwall.htm