We use a system that sends both activation and notification (test result) emails. Occasionally, when a message is sent to an email address, the mail filtering server will quarantine the email because it identifies it as spam or invalid. It might never even hit your mailbox so it would appear to have not been sent. This could create some of the following symptoms: 

• Not receiving the activation email
• Not receiving any notification emails
• Notification emails suddenly stop
   

Resolution

1.  Check your junk email folder to ensure messages aren't being delivered there.

2.  Check with your IT Support and have the following email addresses white-listed (on the server side) so that it treats email address as a safe-sender:
 

• noreply@email.link-live.com
• notify@email.link-live.com
• no-reply@netally.com
• info@link-live.com

3.  Resend the activation email by accessing this site: https://link-live.com/public/activateResend
Just type in your email address and hit submit.