USPS scam ?

I got a email today from ups saying that there's a problem with my order. I didn't open it simply because I know that it's a scam for the simple fact that I don't order anything online. I don't know why people don't want to go to the stores, I don't believe because they are busy either. I worked 50 - 70 hours a week for years and I always still went shopping, out to eat and did yard work.