Used CryptoFilter for Windows 2003 / 2008 (32 bit) for Windows?
Developer’s Description
CryptoFilter is a pass-through S/MIME gateway for Microsoft Exchange.CryptoFilter provides S/MIME decryption, encryption, sign and verification at the edge.It works with every version of Exchange server including,small Business Server and Exchange 2000/2003/2007/2010 and any SMTP server like IMail, Lotus Notes and Novell GroupWise.It Decrypts messages to enable spam and virus scanning,validates the signature and optionally reject messages and encrypts and signs outgoing messages using a single certificate.It encrypt all messages between two server using a single certificate and server based policy handling rather then confused end-users.
Used CryptoFilter for Windows 2003 / 2008 (32 bit) for Windows?
Explore More

CW Tools for Outlook
Trial version
SysInfo MBOX File Viewer
Free
Mailspring
Free
SysTools AOL PFC converter
Trial version
ClearInbox
Trial version
Email Extractor for Windows
Trial version
Mail For You Enterprise Edition
Trial versionReadytooler
Free
Outlook Backup Assistant
Trial version
SysTools Lotus Notes to Google Apps
Trial version
SysTools Office 365 Import
Trial version
Microsoft Outlook
Paid