I'd like to, but it's too much trouble and noone else doesn't so it's pointless..
To echo some of the comments here, I think the main factors making this (PGP, GPG usage) unfeasible at the moment is:
1) Too hard for casual users (=others don't use it)
2) PGP/GPG is ridiculously difficult when using webmail or mobile email clients.
3) Your email usabiliy suffers. With this I'm referring to your ability to search your emails. Once you are using encryption, you can't find anything in it, unless the email is decrypted and saved plain in your email storage.
The usability part is actually forgotten quite a few times in discussion, but I think it's a big problem. If you opt to decrypt and save it, this would be ok, if it happens on your client (local db), but not stored remotely (eg. webmail/imap box). This problem comes with a whole lot of issues attached.
To echo some of the comments here, I think the main factors making this (PGP, GPG usage) unfeasible at the moment is:
1) Too hard for casual users (=others don't use it)
2) PGP/GPG is ridiculously difficult when using webmail or mobile email clients.
3) Your email usabiliy suffers. With this I'm referring to your ability to search your emails. Once you are using encryption, you can't find anything in it, unless the email is decrypted and saved plain in your email storage.
The usability part is actually forgotten quite a few times in discussion, but I think it's a big problem. If you opt to decrypt and save it, this would be ok, if it happens on your client (local db), but not stored remotely (eg. webmail/imap box). This problem comes with a whole lot of issues attached.