Is it just the body of the email that needs to be encrypted, or the attached data as well? Let me know - twendel@sitrof.com

The best and most common way I know of is S/MIME, it provides authentication, message integrity and non-repudiation of origin (using digital signatures) and privacy and data security (using encryption). Before S/MIME can be used, you must obtain and install an individual key/certificate either from an in-house certificate authority (CA) or from a public CA.

There's plenty of information on the web, I would start off by taking a look at Wikipedia

If you need assistance you can contact us through www.iservicesinc.net for help!

For an inexpensive method (with some admin overhead) would be to download/install Gnu Privacy Guard (http://www.gnupg.org/). It is an open source version of PGP which can enable you to deploy encryption capabilities on your local systems and key generation for email communications and file/disk encryption.

There is plenty of How To's and other documentation/assistance that can be found on this platform which should be able to assist you in your in-office deployment.

It may not be the only option, but it might be worth considering for your scenario.

SecureZIP as well!