You can also set customer email by selecting Customers from left pane > double click the customer you intend to enter the email > click Edit to open Customer Information window:
Then enter the customer email address in the Email field provided shown in blue above and click Save. This way, each time you create invoice for your customer, the Email field is automatically populated.
If you need to send a copy of email sent to yourself, select Gear Box > Company Settings > Form Delivery > Email Message > check the “Copy me of all forms sent by email” box:
