that's terrible syntax, shame on the website that generated that!
Here's the markup that meens todays standards, although you'll need to find a 'simple php mailer' .php file. These are all over the next, and very easy to understand, there are plenty of tutorials etc.
Right, new markup is:
<form method="post" action="link-to-your-php-file.php">
<fieldset>
<label for="name">Name</label> <input type="text" name="name" id="name" />
<label for="email">Email</label> <input type="text" name="email" id="email" />
<label for="message">Message</label> <textarea type"text" name="message" id="message" rows="20" cols="30">
<button type="submit" name="submit">Send me your message!</button>
</fieldet>
</form>
So basically how this works is, users will type in the inputs and textareas, and then when they click submit they're sent to your .php mailer file, which draws out the info that has been given, and then is able to send that info in an email to your recipient(s).
Your original generated code there has a captcha n it, which is qute a bad way of stopping spam, as it makes the user have to put in the effort.
Instead, put in a new <label> and <input>, both with the class 'honey'm which you will then hide in your css (.honey { display: none; }. You'll need to give the <input the name of 'honey'. Then in your php (you will probs wna read a full tutorial on this) your php says if that input is set (which normal users won't be doing) then don't send email.
Hope that helps buddy, PM me if you need any further assistance!