You can’t receive messages from blocked Comcast emails. Once you have blocked a particular email address, you won’t be able to receive any of the emails from the sender side. So there is no question of receiving messages from blocked Comcast emails. If you feel like then you can for sure unblock the email address and start receiving emails from the specific person. For any kind of technical assistance, you can consult a professional team of Comcast. Read more: http://supportforhelps.wikidot.com/