You can follow the below steps to add the domain in your panel      

     

1) Login to your Smartech panel

     

2) Click on Admin->Account Configuration



3) Click on Add under Domain Name for Sending Email  Broadcast



4) Click on Add New and enter the domain that you would like to add and Click on Check 




NOTE: The domain should have an A record to it.      

      

5) Click on Verify



6) Choose By DNS Record and Click on Proceed.


7) Update the given DNS in your Domain Cpanel and Click on Close



8) Now click on Authenticate for the same domain 



9) Choose Select By Both (optional) and Click on Proceed



10) Update the given DNS in your domain Cpanel and Click on Close



11) Once the DNS settings reflect globally(https://www.whatsmydns.net) the domain will be Ready For Use.