Blackmail scam
Abuser: spoofed email
Low-life loser is hoping to scare some people by threatening (falsely) that he "has dirt" and can hack into your email address. It is an obvious crock of s**t from a pea-brained idiot. To those less tech-savy out there, don't fall for it. All he has done is spoofed your email address to make it look like it is coming from your own account.