I'm looking for some education on email encryption, please.

Part of what I do is host a few websites on a *nix system.

I want to find out about encryption for the email one of those sites 
will be using, ie, all the aliases under one of my hosted sites.

  While I don't have control of the system that hosts me, I do have 
relatively complete control of the space I own.  So, I could probably 
stick a widget on their webmail or something -- if that's what is 
necessary to accomplish this.

The company I work with offers Norton Internet Security for a fee, 
but, from what I read, it appears to be for the work stations and not 
just for the email.  So maybe that's overkill and may interfere with 
what's already present on any of the end-users' systems?

Anyway, could sks help me try to inform myself so I can make their 
emails as private as possible?  (I know email is NOT private and have 
informed them of that, but they still want to use email for their 
correspondence.)

Hope this makes sense.

Thanks,
Diane

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