PHP Email send and sometimes it does not send

[canditer]

I am really frustrated here, i have been working with the same email code(HTML Form submits fields to email) for awhile now and it has never given me a problem like this. what happens is the emails are sent but sometimes they are not sent. It is like there is a problem at the sever maybe, maybe thge sever switches on and off at times while people are filling in the form. The other scary part is that there are actually two email that are sent, one to the user and the other to the project manager for that form. So when a test was being conducted the user got the confirmation email but the project manager did not get the email. what could cos this?

 

Here is the code

 

<?php 
function customError($errno, $errstr,$error_file,$error_line,$error_context)
  {
  echo "<b>Error:</b> [$errno] $errstr on line $error_line<br />";
  die();
  } 
  set_error_handler("customError"); 
  
$Email2 = $_POST["Email"];


$to = "manager@domain.com" ;
$to2 = $Email2;
$from = "mail@domain.com";
$headers = "From: $from" . "\r\n" . 
$subject = "2012 Registration"; 
$body = "";
$body2 = "Thank you for your registration."."\r\n"."
Your invoice will be send to you within 48hours."."\r\n";


while (list($key,$value) = each($_POST)){
	$body .= sprintf("%s: %s\r\n",$key,$value); 
}
$send = mail($to, $subject, $body, $headers);
$send2 = mail($to2, $subject, $body2, $headers); 

  if(!$send)
{print "We encountered an error sending your mail, please notify webmaster@domain.com";}
?> 

[anevins]

What executes $send2?

[anevins]

Also you could include a carbon copy within the same mail function