Yep, though you can change the image used like this: http://overtar.appspot.com/pete_not@mailana.com/default/http%3a%2f%2fpetewarden.com%2fportraitbw.png http:/

Yep, though you can change the image used like this: http://overtar.appspot.com/pete_not@mailana.com/default/http%3a%2f%2fpetewarden.com%2fportraitbw.png http://overtar.appspot.com/pete_not@mailana.com/default/http... You can also force a 404 response instead by passing the special value '404' as the default image: http://overtar.appspot.com/pete_not@mailana.com/default/404 http://overtar.appspot.com/pete_not@mailana.com/default/404