Show if an encrypted mail has been read (decrypted).
Only for external users. For internal can be in form of : "inform sender about read" button.
Especially great if you send with expiration flag. So you can see if it was read - delivered. Suggest to store in system without any other info - only yes/no. Without IP, date, time only flag to minimize exposure surface.
Anonymous
Show if an encrypted mail has been read (decrypted).
Only for external users. For internal can be in form of : "inform sender about read" button.
Especially great if you send with expiration flag. So you can see if it was read - delivered. Suggest to store in system without any other info - only yes/no. Without IP, date, time only flag to minimize exposure surface.