It is not possible exactly what you want. So I see two possibilites: opening a custom popup with fields like To, CC, Subject, Body, Attachements and let the server send the email or the second option have Outlook (or Gmail, etc) open a new email window with all fields except the attachement field which is not possible to do. Maybe it could be possible (depending on the browser) to add the image in clipboard and have the email body prefilled with "You can paste image from clipboard".