If you have a problem with your email service, for example, if you do not receive or send email, you will want to make sure of the following:
1. If there has been a recent change to Nameservers or DNS Settings in the domain name, it may take up to 48 hours for DNS servers worldwide to be updated and domain services to work properly.
2. Your domain is active and online.
3. That you can log in to your Webmail, which is a direct service through the server without being blocked by a firewall or antivirus. Log in to webmail.yourdomain.com using your entire e-mail as the username and password that you stated when creating the e-mail account.
If you can send and receive emails via webmail, this means that your email service is working properly on the Server side and you should see what a problem might be in your local network or program settings (email client) that you use to manage your email.