I've designed a simple contact form with a file upload feature. And two things are happening when I try to test:

1.) If I attach a file and hit submit, I get the following message in the error page: "...The field upload1 contained e-mail headers in the value submitted. This seems to be a cracking attempt and the message has not been sent.!..."

2.) If I do not attach a file and hit submit, then it redirects to a page not found (empty page).

Can someone help me correct this???