mail() function -sendmail -Mail Exchange Server

[webgod]

I am having a problem with the mail() function. Specifically, I have a client who has a MX account set up. They have a website set up on a remote server with a local server handling their mail.

The mail() function will send mail to myself, however, when I set it to someone on their server, it doesn't send the mail. It seems to be ignoring the Mail Exchange record? I have set up many headers to try to help this thing pass, but nothing wroks...

Any ideas?

<?php

// Create the Reciever for the Mirus e-mail

$reciever="[e-mail]";

// Create the headers for the Mirus e-mail

$Headers="MIME-Version: 1.0\n";
$Headers.="Content-type: text/plain; charset=iso-8859-1\n";
$Headers.="X-Priority: 1\n";
$Headers.="X-MSMail-Priority: High\n";
$Headers.="X-Mailer: PHPMailer\n";
$Headers.="From: $email\n";
$Headers.="Reply-To: $email\n";
$Headers.="Return-Path: $email\n";

// Creat the headers for the User e-mail

$U_Headers="MIME-Version: 1.0\n";
$U_Headers.="Content-type: text/plain; charset=iso-8859-1\n";
$U_Headers.="X-Priority: 1\n";
$U_Headers.="X-MSMail-Priority: High\n";
$U_Headers.="X-Mailer: PHPMailer\n";
$U_Headers.="From: $reciever\n";
$U_Headers.="Reply-To: $reciever\n";
$U_Headers.="Return-Path: $reciever\n";

// Create the messege for the e-mail
$message = "Mirus Web Site Form Results\n";
$message .= "Literature Request: -\n\n";

// First Name
	if ($first_name) // Check for First Name input

{
	$p_first_name = "First Name - $first_name"; // Create a line for the email message
	$message .= "$p_first_name\n"; // Add it to the message
}

// Last Name
	if ($last_name) // Check for Last Name input

{
	$p_last_name = "Last Name - $last_name"; // Create a line for the email message
	$message .= "$p_last_name\n"; // Add it to the message
}

// Institution
	if ($institution) // Check for Institution input

{
	$p_institution = "Institution - $institution"; // Create a line for the email message
	$message .= "$p_institution\n"; // Add it to the message
}

// Department
	if ($department) // Check for Department input

{
	$p_department = "Department - $department"; // Create a line for the email message
	$message .= "$p_department\n"; // Add it to the message
}

// Department
	if ($address) // Check for Address input

{
	$p_address = "Address - $address"; // Create a line for the email message
	$message .= "$p_address\n"; // Add it to the message
}

// Building
	if ($building) // Check for Building input

{
	$p_building = "Building - $building"; // Create a line for the email message
	$message .= "$p_building\n"; // Add it to the message
}

// City
	if ($city) // Check for City input

{
	$p_city = "City - $city"; // Create a line for the email message
	$message .= "$p_city\n"; // Add it to the message
}

// State
	if ($state) // Check for State input

{
	$p_state = "State - $state"; // Create a line for the email message
	$message .= "$p_state\n"; // Add it to the message
}

// Zip Code
	if ($zip_code) // Check for Zip Code input

{
	$p_zip_code = "Zip - $zip_code"; // Create a line for the email message
	$message .= "$p_zip_code\n"; // Add it to the message
}

// Country
	if ($country) // Check for Country input

{
	$p_country = "Country - $country"; // Create a line for the email message
	$message .= "$p_country\n"; // Add it to the message
}

// Telephone
	if ($telephone) // Check for Telephone input

{
	$p_telephone = "Telephone - $telephone"; // Create a line for the email message
	$message .= "$p_telephone\n"; // Add it to the message
}

// Fax
	if ($fax) // Check for Fax input

{
	$p_fax = "Fax - $fax"; // Create a line for the email message
	$message .= "$p_fax\n"; // Add it to the message
}

//Email	
	if ($email) // Check for Email
	{
		$p_email = "Email - $email";  // Create a line for the email message
		$message .= "$p_email\n";  // Add it to the message
	}
	else
	{
		$error .= "<font color=\"cc000\">Email address is missing.</font><br>\n" ;    // Add to Error if missing
	}

// Additional Comments
	if ($additional_comments)	// Check Additional Comments

{
	$p_additional_comments = "Additional Comments - $additional_comments";	// Create a line for the email message
	$message .= "$p_additional_comments\n";	// Add it to the message
}


// Email a copy of the message to person completing the form

if ($error == "") // If Error contains nothing, display a message and send the email
{
	echo "Thank you for using our on-line form.
	<P>A copy of your details will be emailed to you almost immediately.<br><br>
	<br>Please check the email and inform us of any errors as soon as possible.
	<P>Thank you.";

	mail("$email", "Your Form details", $message, "$U_Headers"); //email a copy of messege to user
	mail("$reciever", "Literature Request", $message, "$Headers"); //email a messege to Mirus
}

else  // If Error does contain something, display a message and tell the user what's wrong.
{
	print "Sorry, but the form cannot be sent until the fields are completed: <br><br>\n";
	print "$error<br>\n";
	print "<br>\n";
	print "Please use your \"Back\" button to return to the form to correct the omissions. Thank you.<br>\n";
}

?>

[PT_Dave]

Bringing this one to the top again because I'm having a similar problem.

My scripting is pretty bare bones

{
mail ("$email","subject goes here","message goes here","From:[e-mail]");
}

This is an e-mail confirmation. "$email" is set by the user from a form that posts to this script. This website lives on a remote server, but the e-mail server is a local MS Exchange server.

No one appears to be getting any error messages on either end, so I'm really at a loss as to why the confirmation e-mails won't send.

There is another mail() function prior to the above in the same script which sends from the web server to the Exhange server and that part works. It's when the mail has to come from the Exchange server that the problem arises.

Please note that I am relatively new to all of this mail server stuff, so I really don't know what's going on.

Thanks in advance for any help or suggetions!