You can email a receipt for a payment simply by selecting the payments you wish to email receipts for and using the Receipt button.
Emailing a Payment Receipt
Step Action
1. Select {Accounting}. The page should open on the Accounts Receivable tab.
2. Select {Payments} under Accounts Receivable.
3. Select the payment(s) you wish to print receipts for using the check boxes.
4. Select the {Receipt} button and click on {Email Receipt}.
5. The email will open in a new modal window, with the receipt attached.