Thanks TFCash, Barry, Ray, and OnWebCam for your insight.
For the 8 years +/- that I had this account, very little spam came in. Several days ago I was overwhelmed and was thinking WTF. They mostly shared the same characteristic of appearing to be a "reply" to a message supposedly sent from us. I have been blocking them as they come in, and it has slowed down by about 80%.
A few more days, and this problem will get solved.
Again thanks for the comments.
