cloudPOST
The cloudPOST service lets you install a virtual ‘printer’ on your computer – anything you send to this printer is put in an envelope and delivered to the recipient.
All for less than the price of a first class stamp. The KashFlow and cloudPOST integration means you take advantage of this service to send invoices from anywhere without having to install the print driver.
For more information, log into your KashFlow account and go to Settings -> cloudPOST Options