Why is all of my new e-mail going into my notes folder instead of my inbox?

When I check my inbox on my iphone or from the computer, there are not any new messages. When I go into my e-mail account in yahoo mail, my new e-mails are in my notes folder instead of my inbox. On my iphone, there's not a "notes folder" avaliable for me to view. I did not even realize there was a notes folder until I accessed my yahoo mail through the computer. This is the first time I have had this to happen.

Same thing is happening to me.