Well, I finally got off my ass and onto a real computer. Smart phone wasn't gonna cut it. As per Gameboy and Stampie's request from part II, here are the screenshots of the filter options on my Yahoo account.

Lets see if we can kill the reacurring Tractor Supply ones.

These are the filter options that Yahoo gives me.

For the filter values, I used "all" because I couldn't come up with a better command. I've also noticed that while the sender can change, the place its coming from, like spamcrap.com or clickonitsucker.net, often repete, email after email. Can we block the source?
If you notice that it's one consistent email, you can normally block the sender. Or, if you go to the very bottom of most spam emails, the unsubscribe button is usually there in super tiny font size. They may make it challenging, but my spam has gone down a lot just by finding those and going through the process. I also personally have an email that I use only for store rewards, so most of my spam just gets sent to that instead of my main email.
On the email above I would have a rule that if body contains "free Predator 3500W Generator" mark it read and move to trash.
In reply to Stampie :
So use that criteria for the body right? And use "all" for the action command?
In reply to Paris Van Gorder :
Unfortunately, I can't cram the genie back in that bottle
Appleseed said:
In reply to Stampie :
So use that criteria for the body right? And use "all" for the action command?
I'm afraid of the word "all" as it's presented above. Does that match "all" of the original email or does it mean just the word "all"?
I think it means matching all of the word(s) that you set to filter out. But I'm not 100% sure.
In reply to Appleseed :
I prefer to grab a phrase that stands out. Sometimes they'll change the wording up so if you're doing all it might not match.
Yeah. Like Fidelitylife. I filtered that out, and now I'm just getting Fidelity Insurance crap.
According to this video, on Yahoo if you want to filter by sender address, you can just leave other filters blank, you don't need to specify anything for the content/subject etc such as putting "all" in there. It looks like you should also be able to leave the sender address blank and filter by content, so you could put "predator 3500w generator" in the body rules and you'll never hear about that model via email from anyone.