I have disvovered the same thing. I spent almost a week wondering why I could not get any emails when I generated a ticket. Finally decided to use another email account (gmail) and discovered that osTicket is working perfetly fine.. Anyway, yes, the hotmail thing is strange. Im not even getting any messages to my junk folder. Im still looking into the issue and will post anything I can find out. Untill then, I would suggest putting a notice on the front of your page to inform people of this, which is what I will be doing. I just wonder if there are any other services out there with the same problem