Very few friends use encryption, so full e-mail encryption is out. For a while I tried just signing my e-mails with a PGP cert, but I gave up when friends & col

Very few friends use encryption, so full e-mail encryption is out. For a while I tried just signing my e-mails with a PGP cert, but I gave up when friends & colleagues kept asking why they couldn't open the attachment or what that attachment is ...