Can't receive verification email for iCloud

Just bought my Mac Pro, it's updated to the latest iOS, And I have made an iCloud for my apple iPhone 6 and had it set up on my previous PC. I want to set up my iCloud on my new mac as well, so I sign into it after clicking in settings>iCloud. It says I will receive an email to my primary email address for further instructions, but I havent't received anything. It's been one day, and I have not received any emails. I checked my junk/spam but nothing. What do I do??????