After your domain registration wait 24 hours for the DNS to be released. In case of domain .it or domain .eu you will receive an e-mail confirming your registration. In case of new gTLD you'll receive an email, in 24 hours, requiring to verify your email address. Click on "Click here to verify your email address" to continue the domain registration process.
Otherwise, in case of a domain with a generic extension (.com, .net, .org, etc) you will not receive any email.
You must validate your email address in 6 days or the registration process will be canceled. We recommend to provide a valid and accessible e-mail address to validate as soon as possible.