Emails not being received by comcast customers

Same problem here. See my post on 9/10/19 labeled "Throttled - try again later." The silence from Comcast on this is pretty deafening. I hate that all the information I can find about it is confusing and puts the burden of sorting through the technicalities all on the innocent e-mailer (who is not a spammer), when it is pretty clearly recent Comcast spam policies and software approaches causing the problem.