Teefury

They can see who opens the email.

Presto.

Ah.. I got it. Nothing you can do but open it.. makes much more sense now, thanks!

Be warned that you have to literally open it within the first 10 or 20 seconds D:. It's either that or some people receive the email a minute (or less) before others.

But how do they know if I opened it? That's creepy that they can get into my computer's little hotmail mind and see what I'm doing.

it's an html email - when you open it to view, it has to go back to their server to pull the images, yeah? Then you can just check the receiving IP.

I use an email client, though - so by the time my email logs into my gmail and downloads the message, someone has already opened it.