There are two things you need to do in order to secure you email interactions:
- Enforce Rights Management on Email communications
- Use S/MIME to secure email in transit
Rights Management allows you to control who is allowed to read a specific piece of email. The problem with typical email communications is that once someone receives the message, he can do whatever he wants with it. Print it, forward it, copy it, and more. This clearly isn’t a secure solution. Fortunately, you can use Windows Server 2008 Rights Management Services to project your email communications.
The second thing you need to do to secure you email communication is to encrypt them. The typical email communization today is like a postcard send through snail mail. Anyone with a network sniffer can easily read the contents of your email. Obviously, this is not a secure solution.
You can use certificates and S/MIME encryption to secure your email. However, its not obvious how you do this. Here’s a great article by Matt Clapham and Blake Hutchinson that shows you how to do it:
Thomas W Shinder, M.D.
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MVP – Microsoft Firewalls (ISA)