"block senders" feature doesn't work

Way ahead of you there.  I've created rules up the yin-yang. All that does is to still filter all the spam messages into my spam folder, which I then have to individually go through, check off, and click "Apply rules" too (which BTW I have set to "move to trash" or "delete message". Fat lot of good that does me.  THEY SHOULD NOT BE GOING THERE IN THE FIRST PLACE IF I HAVE BLOCKED THE SENDER VIA WEBMAIL. 

If you had actually read the referenced thread. you would know how to prevent email from going to the spam folder.

So "block sender" doesn't mean diddly-squat?

"Blocked Senders" sends email from up to 250 senders to the Spam folder.

Delete everything in "Blocked Senders" and follow the instructions in the thread.  Post back your results.

Ok the next time I have a few hours to kill I'll do that, since I spent the better part of the morning creating a blocked senders list for absolutely no reason. Silly me thinking "blocked" meant, you know "blocked" ie not allowed through. What a goose. Thanks Cox for making this so crystal clear. 

"Blocked Senders" is what's sending some of the email to Spam.  Actual spam that goes to the Spam folder isn't a problem.  It's just a nuisance.  The real problem is that other, legitimate email can sometimes be routed to Spam.  If everythimg in the Spam folder isn't reviewed, there's a chance that legitimate email could be missed.  It's easier to take Cox Spam filters out of the equation and use Filter Rules to determine email that you want to see or don't want to see.    

If everythimg in the Spam folder isn't reviewed, there's a chance that legitimate email could be missed.

Fair point. My issue was that it sounded like OP wanted the result to be a empty spam folder, and I don't see that realistically happening.

An empty or almost empty Spam folder is actually realistic.  I do what I describe in the thread and I can't remember the last time I received Webmail spam.   

Speaking of Spam, I wish Cox had "plus addressing" so users could create custom emails for spam likely sources like free trials.

https://www.guerrillamail.com