Notes, Notings, and Common Refrains

It's really nothing to worry about. It's probably the result of a spam email that went out, with a spoofed reply-to that used your address as the reply-to. Spammers often use other people's email addresses as the reply-to field, oftentimes just harvesting them from the internet or just making them up.

Just opening this email did not cause any harm to you or your machine.