Again, this response shows how out-of-touch QB/Intuit is.  As everyone on this and on other threads has made clear, it has nothing to do with the ISP and port.  The reason I know that is because I can set up QB to mail through webmail just fine.  I and everyone else in this thread are telling you that we can't use the desktop version of Outlook as the interface for sending our forms.  In other words, when you go to the screen in QB for setting up email, there's a choice for Webmail providers, there's a choice for Intuit's email server, but there's no choice to use Outlook on the desktop.  It's supposed to be there; it's not there. 

Setting this up via webmail is bad because generic webmail just sends a message through an SMTP port, and it does not save the message to any "sent items" folder.  So, that workaround does not keep a record of what invoices were actually sent.