One-time security code isn't being sent to my email address.

I have tried to sign into my drop box account but every time I try to sign in, I have to receive a verification email to log in. This would usually not be a problem, but my email is not receiving these emails. I have tried to be logging into my desktop and phone to see if that would make a difference, and it doesn't. I checked my trash, and they are not there. i tried to see if my email was dead, and I was still receiving emails from other emails. Drop box is just not sending me the code. I need help logging into my account. All of my data was backed up to Dropbox from my previous computer, and I have to access it. Help?