Navigate to Tests / Campaigns > Manage Target Domains.
This will open the Manage Target Domains page.
How to Pre-Authorize Domains
Pre-authorized domains allow you to bypass sending an authorization email for every domain you are testing. To add a new domain, simply click the Add Domain button. A pop up window will appear where you can enter the domain to be added.
Once added, you will be transferred to the Verify Domain page where you can select the
method you wish to use in order to verify the domain. There are four methods to choose from:
email (recommended), an HTML tag, an HTML file, and a manual authorization form. Simply enter the authorizer’s email address and click Send Verification Email.
The recipient will receive an email similar to the one on the left. After clicking Authorize Now, they will be taken to a page similar to the one on the right where they approve the authorization.
The remaining three methods are list below with instructions on how to implement them.