If your domain name is suddenly not working and your name servers are pointing to "ns1.verification-hold.suspended-domain.com" it means that your domain name has been suspended directly by the registry for failing to verify your email address.
ICANN mandates that new domain registrants verify their email address within 15 days of purchasing a new domain name. Verification is achieved by clicking an email link sent to the registered owner. If you do not do this, your domain will be permanently suspended.
To remove the suspension, simply find the verification mail and click the link. The suspension is immediately removed once the verification is successful, however, it may take some time for your name server information to re-propagate through the entire internet.