To validate all gTLD (such as .com, .org, .net, etc.) you have to follow a procedure requested by ICAAN, the international authority managing domain names distribution.
The procedure establishes that any admin-c of a domain has to receive periodically an e-mail containing a validation link to confirm the domain existence. It's essential to check the correctness of your e-mail because if you don't validate by clicking on the link in 5 days your domain will be deactivated.
We recommend you to check your e-mail correctness as soon as possible and to follow the procedure.