As a reseller, you may want your clients' apps to send emails to the users from one of their email addresses. 

To permanently set the sender of emails sent from your app, please follow these steps:

  1. Open the app in the AppMachine design platform
  2. Click on Settings > Advanced in the left vertical menu
  3. Under the heading "Localization" set the desired email address in the "Mails from the app" field