It sucks. It blocks way too much legitimate email, and you can argue that it either does this because of Comcast's lack of interest in delivering legitimate email to their subscribers, or their incompetency. It's pretty amazing to me that a free email service - Gmail - can do spamfiltering right without a direct subscriber profit line, and Comcast can't get their heads out of their asses about it and they charge for it.
If you're a Comcast subscriber, and you use Comcast to receive email, you should ask them how they guarantee that you are receiving legitimate email - from email lists you belong to, from forms that are supposed to process email to you, etc. Ask them. I suspect you'll find the answer less than reassuring.


