New iMac mail not working
I have entered in my yahoo details in mail then accounts, and the account is listed there and yet when I click on Mail Nothing appears at all, no inbox blank or otherwise, I just have the toolbar at the top that says Mail, File, Edit, View etc. I checked that Mail was open by clicking on Finder, Applications and double clicking on Mail but nothing.
Please help no idea what to do!
iMac, OS X Yosemite (10.10.4)