How to send e-mail from form in wordpress - wordpress

Question

I am new in programing and WordPress. I want to send a e-mail from my form with a message, phone, ect. Can anyone tell me how can i do that?
Here is my code so far...
<div id="form">
<?php
add_filter('wp_mail_content_type','set_content_type');
function set_content_type($content_type){
return 'text/html';
}
?>
<div id="name">
<p id="username"> Name: </p>
<input type="text" name="name" class="textfield">
</div>
<div id="name">
<p id="username"> Email: </p>
<input type="text" name="name" class="textfield">
</div>
<div id="name">
<p id="username"> Phone: </p>
<input type="text" name="name" class="textfield">
</div>
<div id="name">
<p id="username"> Message: </p>
<input type="text" name="message" class="textarea">
</div>
<input type="button" value="SEND" id="btn">
</div>

Answer 1

To send mail from a form with following fields, open a new file and copy these lines and save (e.g. mail.php):
<?php
//sending mail
if(isset($_POST['sub']))
{
$uname=$_POST['uname'];
$mailid=$_POST['mailid'];
$phone=$_POST['phone'];
$message=$_POST['message'];
if(mail($uname,$mailid,$phone,$message))
{
echo "mail sent";
}
else
{
echo "mail failed";
}
}
?>
<form name="frm" method="post" action="#">
<label for="uname">Name:</label>
<input type="text" value="" name="uname" id="uname"><br/>
<label for="mailid">Email:</label>
<input type="text" value="" name="mailid" id="mailid"><br/>
<label for="mobile">Phone:</label>
<input type="text" value="" name="phone" id="phone"><br/>
<label for="message">Message:</label>
<input type="text" value="" name="message" id="message"><br/>
<input type="submit" value="Submit" name="sub" id="sub">
</form>

Answer 2

It will have to be much more complicated than what you have at the moment.
My first recommendation would be to use some, rather top-heavy, form plugins, But you will save yourself a lot of time and trouble like that.
http://www.deliciousdays.com/cforms-plugin/
http://wordpress.org/extend/plugins/contact-form-7
My 2nd recommendation would be to follow a popular tutorial for a full custom form to email script.
http://www.catswhocode.com/blog/how-to-create-a-built-in-contact-form-for-your-wordpress-theme
Note: Beware of spam bots and various other possible dangers of just putting a public form up on the web. If's very possible that you will have a hole in your custom code and a could cause some damage if exploited by the right person.