If @ComcastAntiSpam or another employee doesn't reply to your message here, Comcast Security Assurance should be able to help. You can reach them at 1-888-565-4329 (from https://internetsecurity.xfinity.com/help/report-abuse/). Note that this is NOT one of the general customer service numbers.
The first-line reps there are sometimes not very helpful, so you may need to be persistent and keep at them until you get a satisfactory answer.
@bweeks37 I'm going to send you a PM to get some additional information. I don't actually see that you've attempted to send any messages in the past two weeks, so I want to verify some settings and the account being used.