Probably referring to what you are calling email - the message actually doesn't appear in the email, so I would call it messaging instead - recovering engineer moment I suppose.
So when I send this "message", the other provider opens his "message machine" to read it?

Sorry to be sarcastic; I now understand your terminology, but I asked the question because I would like to use Updox, but if I use that function, it means the receiving doc has to get the letter and note into his own EMR. Whether that is AC (rarely) or not, it is a pain for him; he can likely just import a fax more easily. So a letter is nice in theory, but makes more work for the referring doc. Does that sound right or am I missing something?