Everyday, I get between 3-6 emails, almost always from Yahoo accounts, that pass the Comcast spam filter and reach Outlook. Fortunately, Outlook is smart enough to recognize spam (the messages generally have nothing but links in them) and puts them into the "junk" folder. I then block that sender. Every day I copy each email and forward it with the copy attached, to firstname.lastname@example.org. Of course I never hear anything back. I also report most of them to Yahoo but I think these spammers change emails so frequently that's a losing battle.
When I log into my Comcast account on the web, there are invariably legitimate emails from senders I receive mail regularly from, which Comcast puts in the spam folder.