This way you're going to receive only the real spam (that doesn't give a damn about any CAN-SPAM act) and stop all the legitimate newsletters you could easily unsubscribe from... not to mention false positives that just talk about "unsubscribe" for any reason.
The false positives this would generate, in my opinion, outweigh any benefit of having such a filter. I'd rather manually unsubscribe from marketing emails, since, as the author says, the "unsubscribe" functionality is so prevalent.
Good idea on the face of it, but do Gmail filters let you create exceptions? There are plenty of useful emails that also have "unsubscribe" in the body.
I'm OK with some false positives because I think there will be very few in my case. And I can check the Junk folder once in a while to see if there's anything I want to keep. I like it.
I've had this enabled for about 2 months, and its been nothing short of amazing. (picked it up from an HN thread somewhere). Cannot recommend this highly enough.<p>Yes, there's the occasional false positive, but its surprisingly rare. I pop into my "Unsubscribes" folder every few days to make sure nothing is caught, just like my Spam folder. If there's a false positive, I make a new rule in Outlook.<p>Seriously, try it. You'll be surprised how nice it is, like a clean apartment.