When emailing a Purchase Order the system should understand that the person you send it to would be different then the accounting department you submit the Payment for the Invoice to. It should either automatically only pull up the correct email programed to the correct stage of Purchasing or it should at the very least give a drop down option of multiple emails that you select the one you wish to send too. The same should be possible for Sales Orders vs Invoicing and Receipts. Additionally a Signature should always be attached specific to the Log In of the Employee instead of a generic company blurb.