Create a Contact Group

1. Start by logging into webmail.
   Remember, you can log into webmail by visiting webmail.yourwebsiteaddress
   Also, be sure to use the full email address as the username and the password associated with the email account you are logging into.
   
2. Click on Contacts button located on the left-hand side.
   
3. Click menu icon (3 vertical dots), and select Add group option.
   
4. Enter a unique name for the new group, and click Save button.
   

Your group has been created. Now you can assign contacts to your group.

Please see this guide: Assigning Contacts to Groups