Hi Liz,

To further Andrew's comments, if the Invoicing email address is blank, the Contact email will be used when you create a new order and invoice. The Statement email address is ignored by OE.

Look at the BillTo / ShipTo screen of the invoice - are there any email addresses there? If not and you are choosing to email either the BillTo or ShipTo addresses, then that explains what is happening to you.

In the current release of OE81A, you can choose 'Customer' as the location for reading the email address, in case it is blank on the invoice - currently you can't edit invoices to add an email address.

If you are running a version of OE older than 81A and the email addresses on the invoice are blank, then you will always get OE invoices sent to the queue with a blank address.