1. Go to Communications > eNewsletter or Communications > eMail
  2. Hover over the Campaign or eNewsletter name and click Properties
  3. Scroll down to Address Footer and make the necessary changes
  4. Click Save

    Please Note: The changes will not apply to existing mailings. Only new mailings will have the updated address. To have the updated address apply to existing mailings or mailings you duplicate from existing mailings you will need to click on the content for the mailing and save the content after updating the address.