I want to set up Yola Mail and I'm having problems. When I click on 'Yola mail' to the left of the screen, I don't get the purchase option (as per the FAQ info.), I get 'enter a domain name'. My site is already published, so when I enter the name, I'm told I can't have it as it already exists. I purchased the domain from easyspace.com then transferred it over. What am I missing?