sending email in php

kunz (25)
i am trying to send a random number to a email this is what i have so far 
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$rand= mt_rand(100000, 999999)// random number generator

$email = $_POST['email'];
$to=$email;
$header ='From:admin@domain.com';
$subject ='Verification Code';
$body = $rand;


	if (mail($to,$subject,$body,$header))
	{
	 echo 'Check Your Email FOr verfication code';
	}
         else{
	      echo 'Failed';
	      }	



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<p>email</p>
<input type="text" name="email" maxlength="40" 
value='<?php if(isset($email)) echo $email ?>'"> <br>

<input type="submit" value="Register"> <br><br>
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