I understand that generally email communication is insecure by default and would like to know if its possible to setup email servers so that the emails get encrypted when sent between hosts.
I want to know if there is actually a way to include personal information in emails and keep it secure in a Business to Business Scenario (B2B). This usually involves a scenario where and email is generally generated or typed that gives instructions on who to contact or follow up with. It is intended for a human to read and not intended to be processed by a machine
I'd also appreciate any relevant explanation particularly details of commonly known approaches so that i can investigate further. Even if its at the level of a pattern and common strengths and weaknesses.