E-mail help?

I have used e-mail for over 10 years and I will be darned if I can figure this one out!
I have two e-mail addresses and for some reason my main one isn't receiving the messages that I am sending it. There are messages in my spam account? I think something happened with that Yahoo Beta thing?
Help!!
Update: I agree with getting rid of it. The problem is how? I have checked the option that asks if I want to go back to original and it still isn't helping?
Update 2: I GOT IT! NOT SURE WHAT I DID BUT IT IS DONE!
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