Originally Posted by Seasnail
Gmail. I tried the first suggestion, and clicked "unsubscribe". I'll try the second option now, and see if I can filter the email if that doesn't work.
You'll need to be on the web interface (not using another client or smartphone) and if you grab the sender or a partial subject from one of your messages, you should be able to set it up no problem.
If you can't, let me know and I'll tell you how I have my filters set up.