I've a customer who wants to leave his computer accessible to other staff so he can call on them to 'check his email' from time to time, but wants to be able to secure certain messages manually to prevent them being read (e.g. from Lawyer, Accountant, etc). A password would be required to view the message content, and this would need to be asked for each time a secured message is selected/opened.
I've had a bit of a hunt but cannot so far locate a solution. Most email security software is of course based around encryption while transmitting.
Any thoughts or tips appreciated!
Cheers in advance