Cannot receive emails from outside websites and apps. Help?

Hello,

I have trouble gaining access to my Instagram account because I cannot receive the "reset password" email into my Outlook account. My account is a Sending and Receving account so I do not know why I am not receiving emails from Instagram. Also, I checked my junk mail for spam, but there is nothing there. Its really frustrating because I have no way to gain access to my Instagram account. Much help appreciated.