I am makin a form for my site and i used the code by lissa to help me and i did and when i did a test drive it gave me a message sayin you are about to enter unsafe zone blah blah and then it opened up my yahoo page with the email address!!

You could try using a remotely hosted form like this one:

http://www.mailmyform.com

:D

can you post the code you used?
are you using a free host?