Since the experience turned out to be amusing, I thought I'd describe what it was like for me to receive a blackmail attempt via spam.
The blackmailer did not get off to an auspicious start: the email was from "Anonymous Hacker". As opposed to....

An in-line water flow meter is a good device that will offer you a high degree of water monitoring accuracy. Every day, water demand is rising. That is due to an increase in population. But clean water is not that plenty. So, it's vital to ensure ...