Email Issues with hotmail & gmail

If I can't send a message from my website to hotmail.com or gmail.com addresses by this afternoon I will switch hosting and not even try to figure it out, I just don't have the time for it. It's disappointing that I have to troubleshoot this issue and that the others who have asked get no replies. I can send email to other domain names no problem so I am 100% certain that the form works. Looking forward to a response or it's move the whole thing.