dynamic input to php mail not working

From dynamic html form, I submit the social net work user login ids. This works fine but for multiple entries, it is not giving the data input made. The code given below (jquery & form):

$(document).ready(function() {
    var max_fields      = 10; //maximum input boxes allowed
    var wrapper         = $(".input_fields_wrap"); //Fields wrapper
    var add_button      = $(".add_field_button"); //Add button ID
    var x = 1; //initlal text box count
    $(add_button).click(function(e){ //on add input button click
        e.preventDefault();
        if(x < max_fields){ //max input box allowed
            x++; //text box increment
            $(wrapper).append('<div class="k"><input type="text" name="net_work"><input type="text" name="user_login"><input type="text" name="pass_word"/>&nbsp;<a href="#" class="remove_field">X</a></div>'); //add input box
             }
    });

    $(wrapper).on("click",".remove_field", function(e){ //user click on remove text
        e.preventDefault(); $(this).parent('div').remove(); x--;
    })
});

<form method="post" action="xyz.com.php">
NAME: &nbsp;&nbsp;&nbsp;<input type="text" size="28" name="name" /> <br/>
PLACE: &nbsp;&nbsp;<input type="text" size="28" name="place"> <br/>
MOBILE:&nbsp;<input type="text" size="28" name="mobile"> <br/><br/>
<div class="input_fields_wrap">
   NET_WORK  &nbsp; &nbsp;USER_LOGIN&nbsp; &nbsp;PASS_WORD
    <div class="k"><input type="text" name="net_work"><input type="text" name="user_login"><input type="text" name="pass_word">
                   <button class="add_field_button">+</button>
    </div>
</div>
<input type="submit" name='submit'  onclick="show_confirm()" value="SUBMIT">
&nbsp;&nbsp;&nbsp;&nbsp;<input type="reset" value="CLEAR"> 
</form>

The PHP Code:

<?php
$name = $_POST['name'];
$place = $_POST['place'];
$mobile = $_POST['mobile'];

$net_work = $_POST['net_work'];
$user_login = $_POST['user_login'];
$pass_word = $_POST['pass_word'];

//Email body
$email_body = 
"Name:  $name\n".
"Place: $place\n".
"Mobile:$mobile\n\n".

"Social_net work name:  $net_work\n".
"User_id: $user_login  Pass word: $pass_word\n\n";

//Email sending to
 // code goes here
?>

Can any body help me in getting the correct code please?