ถ้าอยากจะระบุ port mail ในการส่ง ต้องใส่อย่างไรครับ

<?php
	include("config.php");
	$strSQL = "SELECT * FROM member WHERE m_user = '".trim($_POST['txtEmail'])."' OR m_tel = '".trim($_POST['txtTel'])."' ";
	$objQuery = mysql_query($strSQL);
	$objResult = mysql_fetch_array($objQuery);
	if(!$objResult)
	{
			echo "Not Found Username or Email!";
	}
	else
	{
			echo "Your password send successful.<br>Send to mail : ".$objResult["m_email"];	
// ชื่อไฟล์ sendmail.php เพื่อรับค่าจาก form 

$MailTo = $objResult["m_email"];
$MailFrom = "admin";
$MailSubject = "Your Account information username and password.";
$MailMessage = "FORGOT  YOU PASSWORD<br>";
$MailMessage .= "NAME: ".$objResult["m_name"]."<br>";
$MailMessage .= "USERNAME : ".$objResult["m_user"]."<br>";
$MailMessage .= "PASSWORD : ".$objResult["m_pass"]."<br>";

$Headers = "MIME-Version: 1.0\r\n" ;
$Headers .= "Content-type: text/html; charset=windows-874\r\n" ;
// ส่งข้อความเป็นภาษาไทย ใช้ "windows-874"
$Headers .= "From: ".$MailFrom." <".$MailFrom.">\r\n" ;
$Headers .= "Reply-to: ".$MailFrom." <".$MailFrom.">\r\n" ;
$Headers .= "X-Priority: 3\r\n" ;
$Headers .= "X-Mailer: PHP mailer\r\n" ;
if(mail($MailTo, $MailSubject , $MailMessage, $Headers, $MailFrom))
}
?>