When I email paystubs from QB Desktop Pro, the PDF of the paystubs are fine as long as I don't send them to a Gmail address -- when they are sent to a Gmail address, the attachment is converted to a Windat file which can't be opened.  (This doesn't happen though when I email a customer invoice to a Gmail address; those attachments stay as PDF's and open fine). 

I've read online that this is an issue caused by Google and that if email messages are sent in Plain Text instead of HTML format, this issue doesn't happen.  As a work around, I changed my Outlook defaults to always send messages in Plain Text but this didn't solve the issue with the paystubs because they are sent directly from QB versus being sent from a new message window which opens when a customer invoice is sent. 

Other than have my employees stop using their Gmail accounts, is there some other setting I can change?