On 2012-06-07, at 11:44 AM, Benny Kjær Nielsen wrote: > On 7 Jun 2012, at 20:12, Richard Herbert wrote: > > Hi, I need to exchange encrypted emails with some customers (but not others). If your customers are all Mac users this might work for you http://www.wellredapps.com/products/dropkey/ Cheers, Frank http://frankeves.com/