Stopped receiving contact forms from my website

I have a professional website with a contact page that sends forms with client inquiries to my Hotmail inbox. Some time between 8/23/13 and 8/28/13 these forms stopped showing up in my inbox. They are also not in my junk mail folder. Several months ago I set it up so that these forms also got sent to a Gmail address. That gmail address is still receiving the contact forms. I tried several tests this morning but have not received any of them in my Hotmail inbox. My website programmers have not changed anything. I notice several other users with postings that they stopped receiving e-mail on 8/26/13, although none of them specifically mention website contact forms. As far as I can tell, I am still receiving all other e-mails, just not the ones from my website. What has been changed at your end, and what should I tell my programmers to adjust in response?

Thanks!

David