Okay, this is kind of stupid, on his part.

It's true that RFC 822 came out after he claims to have invented email. It obsoleted RFC 733, where you find To, Cc, Bcc, and in fact much of what was (better-) formalized in 822. 1977. If November 1977 is insufficiently early, then 733 obsoleted 724, which was released in May of that year (and is basically a first attempt).

He didn't "invent" email. He implemented something that a lot of people were doing. Crocker et al. invented the format used for messages, as described in the series of RFCs 724 - 733 - 822. See rfc-editor.org for details.

Amy!