Microsoft Exchange
5.5, 2000, 2003, 2007, 2010, 2013

Mobile Email
Blackberry Enterprise Server 4&5, ActiveSync, Mobile Iron, Good

Cloud Message Hygeine
Symantec Messagelabs, Microsoft FOPE, Mimecast, Websense

On Premise Message Hygeine
McAfee Security for Email Servers, Mail Marshal, Ironport

Email Archiving
Zantaz EAS, Enterprise Vault

Email Security
TLS, Symantec PGP

Active Directory
NT4, 2000, 2003, 2008 (R2)

Two Factor Authentication
RSA, ActivIdentity