Reply #31: That's a pretty shaky limb you're on

[blogslut]

Here's what I learned conducting my own experiment.

I sent an image from one of my other email accounts to the email address for my YFROG account and put @myYFROGusername in the subject line. Sure enough, the image showed up on my YFROG page and for approximately 10 seconds, no URL appeared under my YFROG username, then the page with the image refreshed and included a URL to the image.

It's not a matter of recognizing the physical presence of the person uploading the image - it's a matter of the sender knowing the email address of the YFROG account.