Your time safer is here: 

IT IS mail 2012 is the solution for avoiding boring, really labor extensive job: Today's specially is something your accounting will really admire, because recurring task to send out invoices either electronically or even as hard copy with postage are history now. With IT IS mail 2012, you can send invoices directly from Dynamics NAV; either in single email mode or as automated bulk e-mailings. 

This is how the sending process for invoices as bulk mailing works: 

Posted invoices are shown in a list, where you can either tag them or have them tagged automatically. All tagged invoices are sent from the list automatically via e-mail. Those invoice e-mails will be displayed in a send waiting list and the particular e-mails are sent out on and on. You can always keep track of the status of the sending process, if you wish. The process is robust against malfunctions like unknown recipients. You can configure various parameters to decide how often IT IS mail 2012 will try to reach the recipient in such a case.

Optionally, but not as part of the regular product, you can insert an electronic signature solution. Please ask us directly for the implementation and technical requirements. But not only accounting benefits from the bulk mailing with IT IS mail 2012: The marketing department is able send newsletters and product information easily and the purchasing department can request to receive quotes directly with several vendors.