HP 850 - Manual (Page 57)

Chapter 4: Using hp instant share 57
Windows
Images are not e-mailed directly to anyone. Rather, a message
is sent to each e-mail address that you selected in the Share
menu. The message contains a thumbnail of each of the
images that were selected for that address, as well as a link to
a web page where the recipient can view the images. From that
web page, the recipient can do things like reply to you or print
the image. This makes it easy for people who use different
e-mail programs to be able to see your images without the
difficulty of dealing with e-mail attachments.
Macintosh
Images are e-mailed directly to recipients using the default
e-mail program on your computer.