> can you prove in court you received a given email Actually, you can get DKIM pubkey from DNS, and verify the e-mail. My mail server does that upon reception,

> can you prove in court you received a given email Actually, you can get DKIM pubkey from DNS, and verify the e-mail. My mail server does that upon reception, and appends an extra header with validation results to the message. So in my e-mail client I see: Authentication-Results: ....; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=sKwsgxpv on e-mail from gmail users. So unless Google claims I hacked the gmail or the account of the sender, I can't fake that e-mail message and make it validate.