Your Global Opt Out list is an account suppression list that permanently prevents specific email addresses from receiving any future emails from your account, regardless of the campaign or mailing list.
To manually add a recipient to your Global Opt Out list, navigate to the Lists tab and select the Global Opt Out option under the Include List Types section. This will reveal the previously hidden Global Opt Out list.
Once the list is visible, click on its name to open it. From there, you can add recipients to your Global Opt Out list using either the Add or Import buttons. Below is an example of how to manually add a single recipient using the Add button.