Want to protect yourself ... don’t send incriminating e-mails. I would never send an e-mail that I didn’t want the whole world to read.
If I wanted to send a message to someone unbeknownst to anyone I would put in an envelope and put a stamp on it ... off it would go. Might take a little longer, but it would be private.
Howie Carr reports an old mafia/pol credo that I can paraphrase as never write when to speak would do, and never speak when a nod would be adequate.