Hello, when new email arrives, and it is not already encrypted, I would like to run it through a filter, which would encrypt the message with my public gpg key, as if the original sender has sent the email encrypted.
Why do I want to do this ? Why not ask the sender to send encrypted messages to start with ? Lets say my bank sends me emails. I cannot forcer my bank to use gpg encryption. I am happy they use email at all, instead of paper mail. My email server is untrusted. It can be hacked into and emails stolen. Full disk encryption will not help, because the disk must be decrypted during runtime. With my scheme, all emails would be stored encrypted on my server, and decryption key does not exist on the server (emails are decrypted on my local client) What would be the best way to implement this ? Can such filter work, without ever storing plaintext email on disk ? Any other comments ? thanks,
