OK, so I have a PHP mail function. It works fine when I put it on my server but when I put I mail it to my client so he can put it on his server it doesn't work. It doesn't give me any errors on their server and gets to the "Thanks" page just fine but never really sends the email. They say it's because PHP Mail does not have the right headers but I didn't think that it needed headers if it was just simply "mail(to, subject, message)" They say they have all PHP related functions set properly because I initially thought it was PHP Mail being turned off.
Any suggestions would be great.