Having the same issue to my email address, as well as many others with Comcast. I work at an IT company, who hosts many different local business emails. Most come from the same email server, and everyone keeps getting blocked/sent to spam intermittently. It will work fine for a little while, and then all of a sudden emails get blocked again.
@ComcastAntiSpam - may I message you some example domains, and the IP address of the sending server, so you can investigate? All users on this server are just local businesses, who deal with comcast email users very frequently. Not sure why everyone keeps getting flagged as spam. Most people do not enable keep a copy of spam emails, so they never even know they're missing emails, which is bad for business.
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