When you email a ticket/invoice/task from within the software, you can set what the outgoing email address will be. To set this, navigate to Settings > System Settings > Invoices (tab on the right). Look for a field called "Email Address for PDF Emailing". Enter in the email address you want your tickets/invoices/tasks to originate from. Once entered, you'll also need to click the purple 'Verify' button next to the field. This will send an email to that address from Amazon Web Services. You'll need to click the link inside that email to verify that email address. You'll have 24 hours from the time you click 'verify' to click the link within the email or you'll have to re-verify. Once you see the web page that says "Congratulations!" you are all set. Lastly, don't forget to hit the 'Save' button at the bottom of the System Settings > Invoices page to save that address.