Change catch all e-mail

Hello,

I think i have a catch all account on my profile.

I have installed the spam filter, but i got a lot of junk. I use echange 2013.

I see now that there are people sending me to adres: dgfhfjjf@ and its reaching in my mailbox.

So there i can see thats a catch all account. How can i change this?

Greetings,

Albert