Sorry it didn't help. I went back and looked and mine was in a Disney Destinations E-mail titled Disney Vacation Must Sees for the Family. We got it exactly a month and a half before our trip. At the bottom it had what looks like an ad that says "Disney's Photopass", with 2 sentences under it promoting photopass in general:i.e. capture magical memories etc., but making no mention of any discount or pre-purchase. Under that it says "Click here for details", when I clicked it, it took me to the pre-purchase offer on the website. Sorry guys, it didn't have any links for a friend. I think I would try contacting photopass and asking about it if I were 2 weeks or less out from my trip and had not gotten anything yet.
One question I had is that with the pre-Order, we have a custom photopass card being sent to us that supposedly links the photos directly to our account when they are taken. Does anyone know if that means the 30 days will start running from the time the picture is taken if we use that card? If so, I'm not going to use it. I want a full 30 days when I get back for edits, borders etc. I don't know whether to use that card; the card that came with our travel package that we registered; or just pick up a new one from a photographer in the parks.