Set up invoice mailing in the Customer ledger preferences

1. Go to the Customer ledger preferences (AR101000) window.
2. Go to the Mailing settings tab.
3. In the Default sources table, click and select INVOICE on the new row.
4. In the Default email account column, select the email account from which the invoices will be sent.
5. In the Report column, select the report to be used for generating the invoice, which will be sent as an attachment.
6. In the Notification template column, select the InvoiceNotification template, which will be used to compose the body of the email.
7. In the Format column, select the attachment format.
   If the format specified in this mailing does not match the format preferences of a contact, the attachment will be sent in the format preferred by the contact.
8. Select the Active check box for the mailing.
9. In the Default recipients table, click to add a new row.
10. In the Contact type column, select Invoicing.
    The person who is displayed in the Attention field, in the Customers (AR303000) window on the Invoicing settings tab, will be the recipient for the dunning letters.
11. Click .

You can also configure dunning letter mailing for:
One customer, see: Set up invoice mailing for a customer.
Customer classes, see: Set up invoice mailing for a customer class.