changing main mx record and mail()

[cmose]

hola,
I recently changed the main mx record of my site to point to the ip address of the mail server that we use. - however, now it doesn't appear that the mail() function is working correctly, i.e., the mail() test doesn't fail but the message is never sent (that I know of, i.e., no message is received at any of the addresses I try using). Does anyone know if changing the main mx record adversly affects the mail()/sendmail functionality?
thanks!

[yelvington]

Nope. If it were a requirement that a mail transmitter had to be a valid mail recipient, my spam load would be tiny.

It's possible that your change caused your email to run afoul of some paranoid antispam measures, but MX records have nothing to do with normal MTA behavior, whether sendmail, postfix, exim, et cetera.

[cmose]

hmnnn...yeah I didn't think it should, but right after I changed the mx record, my mail() script stopped working (posted below) - if anyone see's anything wrong with this script, please let me know - it did work at one point

<?
//email handling form for contact form, resume form, and support form
//contact form emails sales contact info
//resume form emails name/email/phone and resume attachment
//support form not created yet, will email image/screnenshot/etc.,
$path="Gnossos Software::Contact Us";
include ("files/header.php");
include ("files/verify.php");
//to handle standard contact form
if(strstr($_SERVER['HTTP_REFERRER'], 'contact.php')){ 
	$subject = "SALES, subject: " . $_POST['subject'];
	$to = "[e-mail]";
	if(!verify_email($_POST['email'])){
		echo "bad email";
		exit;
	}
	//if(!verify_phone(stripslashes($_POST['phone']))){
	//	echo "bad phone number";
	//	exit;
	//}

foreach ($_POST AS $key => $value){
	$message .= $key."=".$value."\n";
}

$headers = "From: $_POST['email']";
} else {
	//this handles both support and resume submission as both involve file attachments
	//to handle resume submission form
	if(strstr($_SERVER['HTTP_REFERRER'], 'resume.php')){
		$subject = "RESUME, subject: " . $_POST['name'];
		$to = "[e-mail]";		
	}
	//to handle support form
	if(strstr($_SERVER['HTTP_REFERRER'], 'support.php')){
		$subject = "SUPPORT: subject: ";
		$to = "[e-mail]";
		if(!verify_phone(stripslashes($_POST['phone']))){
			echo "bad phone number";
			exit;
		}	
	}

if(!verify_email($_POST['email'])){
	echo "bad email";
	exit;
	}
$from = stripslashes($_POST['name'])."<".stripslashes($_POST['email']).">";

	foreach ($_POST AS $key => $value){
		$message .= $key."=".$value."\n";
	}

	$tmp_name=$_FILES['file']['tmp_name'];
	$type = $_FILES['file']['type'];
	$name = $_FILES['file']['name'];
	$size = $_FILES['file']['size'];

	$headers = "From: $_POST['email']";

	if (file_exists($tmp_name)){
		if(is_uploaded_file($tmp_name)){
			$file = fopen($tmp_name, 'rb');
			$data = fread($file, filesize($tmp_name));
			fclose($file);

			$semi_rand = md5(time());
			$mime_boundary = "==Multipart_Boundary_x{$semi_rand}x";

			$headers .= "\nMIME-Version: 1.0\n" .
		    	"Content-Type: multipart/mixed;\n" .
		    	" boundary=\"{$mime_boundary}\"";

			$message = "This is a multi-part message in MIME format.\n\n" .
	  		   "--{$mime_boundary}\n" .
			   "Content-Type: text/plain; charset=\"iso-8859-1\"\n" .
			   "Content-Transfer-Encoding: 7bit\n\n" .
			   $message . "\n\n";

			$data = chunk_split(base64_encode($data));

			$message .= "--{$mime_boundary}--\n" .
		        "Content-Type: {$type};\n" .
		        " name=\"{$name}\'\n" . 
		        "Content-Disposition: attachment;\n" .
		        " filename=\"{$name}\"\n" .
		        "Content-Transfer-Encoding: base64\n\n" .
		        $data ."\n\n" .
		        "--{$mime_boundary}--\n";
			}
	}
}


echo "<div id=\"content\">";
echo "<div id=\"leftcont\">";
if(mail($to, $subject, $message, $headers)){
	echo "<h4 style=\"text-align:center\">Your message was sent, someone will contact you shortly. <br /> 
	You will now be redirected to the home page...</h4>";
	//sleep(100);
	//header("Location: [url]http://69.36.167.110/test/testing.php[/url]");
	//exit;
} else {
	echo "<h4 style=\"text-align:center\">Your message failed, please contact <a 
	href=\"mailto:[e-mail]\">the 
	webmaster</a><br />You will now be redirected to the home page...</h4>";
	//sleep(100);
	//header("Location: [url]http://69.36.167.110/test/testing.php[/url]");
	//exit;
}
echo "</div><!--end leftcont-->";
include ("files/footer.html");
?>

ok, I just threw a test statement into the first bit there (e.g., the if contact.php) and I realized it's not getting into the if statement at all and just proceeding to the mail statement (which succeeds with blank information). I swear though that I haven't changed those at all - just wondering what I can do (I guess maybe include a hidden field in each form to specify which one it will be).
THanks !

ok...answered my own question, used a hidden field in the various forms to determine the correct code portion to use (don't know why the string comparison stopped working). Question, would it be more efficient to use a switch statement then what is currently there?

[cmose]

ok,
well...I changed the send.php file around a bit and now no attachments aren't going through, e.g., files aren't attached to the email on the recipient end. I just don't see where things have changed though, so if someone has an insight as to why that's not working, I'd be much obliged (probably quite obvious). Thanks!

<?
//email handling form for contact form, resume form, and support form
//contact form emails sales contact info
//resume form emails name/email/phone and resume attachment
//support form not created yet, will email image/screnenshot/etc.,
$path="Gnossos Software::Contact Us";
include ("files/header.php");
include ("files/verify.php");

$formtype = stripslashes($_POST['formtype']); 

//for contact form
if ($formtype == "contact"){
	$subject = "SALES, subject: " . $_POST['subject'];
	$to = "[e-mail]";
	if(!verify_email($_POST['email'])){
		echo "bad email";
		exit;
	}
}//end contact if

//these are common to all form types
foreach ($_POST AS $key => $value){
	$message .= $key."=".$value."\n";
}

$headers = "From: $_POST['email']";
$from = stripslashes($_POST['name'])."<".stripslashes($_POST['email']).">";

if(!verify_email($_POST['email'])){
	echo "bad email";
	exit;
}
//end common actions

//this handles both support and resume submission as both involve file attachments
//to handle resume submission form
if(($formtype == "resume") or ($formtype == "support")){
	//to handle resume form
	if($formtype == "resume"){
		$subject = "RESUME, subject: " . $_POST['name'];
		$to = "[e-mail]";		
		echo "TEST\n";
	}
	//to handle support form
	if($formtype == "support"){
		$subject = "SUPPORT: subject: ";
		$to = "[e-mail]";

	if(!verify_phone(stripslashes($_POST['phone']))){
		echo "bad phone number";
		exit;
	}	
}
echo "TO: ".$to."\n";
echo "FORM: ".$formtype."\n";
$tmp_name=$_FILES['file']['tmp_name'];
$type = $_FILES['file']['type'];
$name = $_FILES['file']['name'];
$size = $_FILES['file']['size'];

if (file_exists($tmp_name)){
	if(is_uploaded_file($tmp_name)){
		$file = fopen($tmp_name, 'rb');
		$data = fread($file, filesize($tmp_name));
		fclose($file);

		$semi_rand = md5(time());
		$mime_boundary = "==Multipart_Boundary_x{$semi_rand}x";

		$headers .= "\nMIME-Version: 1.0\n" .
	    	"Content-Type: multipart/mixed;\n" .
	    	" boundary=\"{$mime_boundary}\"";

		$message = "This is a multi-part message in MIME format.\n\n" .
 		"--{$mime_boundary}\n" .
		"Content-Type: text/plain; charset=\"iso-8859-1\"\n" .
		"Content-Transfer-Encoding: 7bit\n\n" .
		$message . "\n\n";

		$data = chunk_split(base64_encode($data));

		$message .= "--{$mime_boundary}--\n" .
		"Content-Type: {$type};\n" .
		" name=\"{$name}\'\n" . 
		"Content-Disposition: attachment;\n" .
		" filename=\"{$name}\"\n" .
		"Content-Transfer-Encoding: base64\n\n" .
		$data ."\n\n" .
		"--{$mime_boundary}--\n";
	}//end is uploaded
}//end file  exists
}//end resume/support

//common information to all forms
echo "<div id=\"content\">";
echo "<div id=\"leftcont\">";
if(mail($to, $subject, $message, $headers)){
	echo "<h4 style=\"text-align:center\">Your message was sent, someone will contact you shortly. <br />";
} else {
	echo "<h4 style=\"text-align:center\">Your message failed, please contact <a 
	href=\"mailto:[e-mail]\">the 
	webmaster</a><br />You will now be redirected to the home page...</h4>";
$email = true;
}

echo "</div><!--end leftcont-->";
include ("files/footer.html");
?>

thanks!