I suggest you delete anything in inbox that you don't recognize. Don't open it, just delete to avoid possible virus. (All this from a non technical type)
I figure that anyone who wants to contact me personally and not sell me something, or infect my computer, will clearly ID themselves and what they want without having me opening the message.
The Perfect Speed
"any number is a limit, and perfection doesn't have limits.
Perfect speed, my son, is being there.”
Chiang from "Jonathan Livingston Seagull