I hate to be the guy who says it but, pics or it didn't happen.
It's really easily to fabricate something like this. Provide images with EXIF data intact.
even with that, aside from the e-mail address itself, who is to say Jobs was the one who wrote it, all i see is an e-mail address with his name, i know everyone likes to think it is really Jobs replying to our e-mails but i'm still skeptical