I suspect someone complained about all the spam that was recently being sent out with your email address on it, Greg. I know it was spoofed, but one of the few tools for stopping this is for the ISP (Comcast in this case) to refuse mail from that domain.

I have my internet access service with Comcast, but get my mail through a separate service (Lueders.US domain). One of the reasons is that I was getting LOTS of correspondants' mail blocked by Comcast for spamming. BTW, I didn't report you [g].