SMTP server response: 501 5.5.4 Invalid Address

[jim.davidson]

I have a piece of code that works on one domain but not on another.  On the domain running php 5.1 all is ok.  On the domain running php 4.4 I get this error:

 

SMTP server response: 501 5.5.4 Invalid Address

 

Hosting service keeps telling me there must be an error in the code.  If that's the case why would it work on version 5.1?

 

Here is the code, I don't know what could be wrong.  Any help will be greatly appreciated.

 

<?php

// set flag to indicate whether mail has been sent

$mailSent = false;

$sent = false;

if (array_key_exists('sendComments', $_POST)) {

  // mail processing script

  // remove escape characters from POST array

  if (get_magic_quotes_gpc()) {

    function stripslashes_deep($value) {

    $value = is_array($value) ? array_map('stripslashes_deep', $value) : stripslashes($value);

    return $value;

    }

    $_POST = array_map('stripslashes_deep', $_POST);

  }

  // validate the input, beginning with name

  $name = trim($_POST['name']);

  if (empty($name)) {

    $error['name'] = 'Please enter your name';

  }

  $phone = trim($_POST['phone']);

  $email = $_POST['email'];

  // check for valid email address

  $pattern = '/^[^@]+@[^\s\r\n\'";,@%]+$/';

  if (!preg_match($pattern, trim($email))) {

    $error['email'] = 'Please enter a valid email address';

  }

  // check the content of the text area

  $messageBody = trim($_POST['message']);

  if (empty($messageBody)) {

    $error['message'] = 'Please enter your message';

  }

  // initalize variables

  $to = 'jim@independent-micro.com';

  $subject = 'Feedback from PCI-Controls web site';

  // build the message

  $message = "From: $name\n\n";

  $message .= "Email: $email\n\n";

  $message .= "Phone Number: $phone\n\n";

  $message .= "Comments: $messageBody";

  // build additional headers

  $additionalHeaders = "From: PCI Controls Web Site<$email>\r\n";

  $additionalHeaders .= "Reply-To: $email";

  // send the mail if ther are no errors

  if (!isset($error)) {

    $mailSent = mail($to, $subject, $message, $additionalHeaders);

// check to see if sent successfully

if (!$mailSent) {

  $error['notSent'] = 'Sorry there is a problem sending your message.  Please try later.';

}

else {

  $sent = true;

}

  }

} 

?>

[jim.davidson]

Well, I finally convinced the hosting service to update to PHP5 all works fine.