Don't worry, this is normal. It takes a few days for your name to be added to all of the DNS lookup tables, which are the listings used to enable a computer to find a website. Think of them like a huge online telephone directory, that has a unique computer address listed for each domain name that has been registered. Because of this you will not be able to send or receive email immediately. The same is true for your website, if you have created one, which will not be immediately accessible to all computers online following registration. We recommend waiting at least a week if not a couple of weeks after the domain name registration is complete before giving out your new email address. It is also a good idea to test your new email address before handing it out.