Email encryption utilising Public/Private key pairs ensures that your sensitive email communication remains private to the sender and recipient(s) of the communication whilst providing guarantees that the sender is who they say they are.
Cutecra recommend PGP Email encryption solutions.
Email encryption can be deployed at an individual User/PC level using PGP Desktop software or at a gateway level using PGP Universal to provide transparent email encryption to a larger user base.
PGP Desktop software also offers end point security options including whole disk encryption.