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<?php
if (! class_exists ( 'PostmanSmtpMappings' )) {
class PostmanSmtpMappings {
// if an email is in this domain array, it is a known smtp server (easy lookup)
private static $emailDomain = array (
// from http://www.serversmtp.com/en/outgoing-mail-server-hostname
'1and1.com' => 'smtp.1and1.com',
'airmail.net' => 'smtp.airmail.net',
'aol.com' => 'smtp.aol.com',
'Bluewin.ch' => 'Smtpauths.bluewin.ch',
'Comcast.net' => 'Smtp.comcast.net',
'Earthlink.net' => 'Smtpauth.earthlink.net',
'gmail.com' => 'smtp.gmail.com',
'Gmx.com' => 'mail.gmx.com',
'Gmx.net' => 'mail.gmx.com',
'Gmx.us' => 'mail.gmx.com',
'hotmail.com' => 'smtp.live.com',
'icloud.com' => 'smtp.mail.me.com',
'mail.com' => 'smtp.mail.com',
'ntlworld.com' => 'smtp.ntlworld.com',
'rocketmail.com' => 'plus.smtp.mail.yahoo.com',
'rogers.com' => 'smtp.broadband.rogers.com',
'yahoo.ca' => 'smtp.mail.yahoo.ca',
'yahoo.co.id' => 'smtp.mail.yahoo.co.id',
'yahoo.co.in' => 'smtp.mail.yahoo.co.in',
'yahoo.co.kr' => 'smtp.mail.yahoo.com',
'yahoo.com' => 'smtp.mail.yahoo.com',
'yahoo.com.ar' => 'smtp.mail.yahoo.com.ar',
'yahoo.com.au' => 'smtp.mail.yahoo.com.au',
'yahoo.com.br' => 'smtp.mail.yahoo.com.br',
'yahoo.com.cn' => 'smtp.mail.yahoo.com.cn',
'yahoo.com.hk' => 'smtp.mail.yahoo.com.hk',
'yahoo.com.mx' => 'smtp.mail.yahoo.com',
'yahoo.com.my' => 'smtp.mail.yahoo.com.my',
'yahoo.com.ph' => 'smtp.mail.yahoo.com.ph',
'yahoo.com.sg' => 'smtp.mail.yahoo.com.sg',
'yahoo.com.tw' => 'smtp.mail.yahoo.com.tw',
'yahoo.com.vn' => 'smtp.mail.yahoo.com.vn',
'yahoo.co.nz' => 'smtp.mail.yahoo.com.au',
'yahoo.co.th' => 'smtp.mail.yahoo.co.th',
'yahoo.co.uk' => 'smtp.mail.yahoo.co.uk',
'yahoo.de' => 'smtp.mail.yahoo.de',
'yahoo.es' => 'smtp.correo.yahoo.es',
'yahoo.fr' => 'smtp.mail.yahoo.fr',
'yahoo.ie' => 'smtp.mail.yahoo.co.uk',
'yahoo.it' => 'smtp.mail.yahoo.it',
'zoho.com' => 'smtp.zoho.com',
// from http://www.att.com/esupport/article.jsp?sid=KB401570&cv=801
'ameritech.net' => 'outbound.att.net',
'att.net' => 'outbound.att.net',
'bellsouth.net' => 'outbound.att.net',
'flash.net' => 'outbound.att.net',
'nvbell.net' => 'outbound.att.net',
'pacbell.net' => 'outbound.att.net',
'prodigy.net' => 'outbound.att.net',
'sbcglobal.net' => 'outbound.att.net',
'snet.net' => 'outbound.att.net',
'swbell.net' => 'outbound.att.net',
'wans.net' => 'outbound.att.net'
);
// if an email's mx is in this domain array, it is a known smtp server (dns lookup)
// useful for custom domains that map to a mail service
private static $mxMappings = array (
'1and1help.com' => 'smtp.1and1.com',
'google.com' => 'smtp.gmail.com',
'Gmx.net' => 'mail.gmx.com',
'icloud.com' => 'smtp.mail.me.com',
'hotmail.com' => 'smtp.live.com',
'mx-eu.mail.am0.yahoodns.net' => 'smtp.mail.yahoo.com',
// 'mail.protection.outlook.com' => 'smtp.office365.com',
// 'mail.eo.outlook.com' => 'smtp.office365.com',
'outlook.com' => 'smtp.office365.com',
'biz.mail.am0.yahoodns.net' => 'smtp.bizmail.yahoo.com',
'BIZ.MAIL.YAHOO.com' => 'smtp.bizmail.yahoo.com',
'hushmail.com' => 'smtp.hushmail.com',
'gmx.net' => 'mail.gmx.com',
'mandrillapp.com' => 'smtp.mandrillapp.com',
'smtp.secureserver.net' => 'relay-hosting.secureserver.net',
'presmtp.ex1.secureserver.net' => 'smtp.ex1.secureserver.net',
'presmtp.ex2.secureserver.net' => 'smtp.ex2.secureserver.net',
'presmtp.ex3.secureserver.net' => 'smtp.ex2.secureserver.net',
'presmtp.ex4.secureserver.net' => 'smtp.ex2.secureserver.net',
'htvhosting.com' => 'mail.htvhosting.com'
);
public static function getSmtpFromEmail($hostname) {
reset ( PostmanSmtpMappings::$emailDomain );
foreach ( PostmanSmtpMappings::$emailDomain as $domain => $smtp ) {
if (strcasecmp ( $hostname, $domain ) == 0) {
return $smtp;
}
}
return false;
}
public static function getSmtpFromMx($mx) {
reset ( PostmanSmtpMappings::$mxMappings );
foreach ( PostmanSmtpMappings::$mxMappings as $domain => $smtp ) {
if (PostmanUtils::endswith ( $mx, $domain )) {
return $smtp;
}
}
return false;
}
}
}
if (! class_exists ( 'PostmanSmtpDiscovery' )) {
class PostmanSmtpDiscovery {
// private instance variables
public $isGoogle;
public $isGoDaddy;
public $isWellKnownDomain;
private $smtpServer;
private $primaryMx;
private $email;
private $domain;
/**
* Constructor
*
* @param mixed $email
*/
public function __construct($email) {
$this->email = $email;
$this->determineSmtpServer ( $email );
$this->isGoogle = $this->smtpServer == 'smtp.gmail.com';
$this->isGoDaddy = $this->smtpServer == 'relay-hosting.secureserver.net';
}
/**
* The SMTP server we suggest to use - this is determined
* by looking up the MX hosts for the domain.
*/
public function getSmtpServer() {
return $this->smtpServer;
}
public function getPrimaryMx() {
return $this->primaryMx;
}
/**
*
* @param mixed $email
* @return string|bool
*/
private function validateEmail($email) {
return PostmanUtils::validateEmail ( $email );
}
private function determineSmtpServer($email) {
$hostname = substr ( strrchr ( $email, "@" ), 1 );
$this->domain = $hostname;
$smtp = PostmanSmtpMappings::getSmtpFromEmail ( $hostname );
if ($smtp) {
$this->smtpServer = $smtp;
$this->isWellKnownDomain = true;
return true;
} else {
$host = strtolower ( $this->findMxHostViaDns ( $hostname ) );
if ($host) {
$this->primaryMx = $host;
$smtp = PostmanSmtpMappings::getSmtpFromMx ( $host );
if ($smtp) {
$this->smtpServer = $smtp;
return true;
} else {
return false;
}
} else {
return false;
}
}
}
/**
* Uses getmxrr to retrieve the MX records of a hostname
*
* @param mixed $hostname
* @return mixed|boolean
*/
private function findMxHostViaDns($hostname) {
if (function_exists ( 'getmxrr' )) {
$b_mx_avail = getmxrr ( $hostname, $mx_records, $mx_weight );
} else {
$b_mx_avail = $this->getmxrr ( $hostname, $mx_records, $mx_weight );
}
if ($b_mx_avail && sizeof ( $mx_records ) > 0) {
// copy mx records and weight into array $mxs
$mxs = array ();
for($i = 0; $i < count ( $mx_records ); $i ++) {
$mxs [$mx_weight [$i]] = $mx_records [$i];
}
// sort array mxs to get servers with highest prio
ksort ( $mxs, SORT_NUMERIC );
reset ( $mxs );
$mxs_vals = array_values ( $mxs );
return array_shift ( $mxs_vals );
} else {
return false;
}
}
/**
* This is a custom implementation of mxrr for Windows PHP installations
* which don't have this method natively.
*
* @param mixed $hostname
* @param mixed $mxhosts
* @param mixed $mxweight
* @return boolean
*/
function getmxrr($hostname, &$mxhosts, &$mxweight) {
if (! is_array ( $mxhosts )) {
$mxhosts = array ();
}
$hostname = escapeshellarg ( $hostname );
if (! empty ( $hostname )) {
$output = "";
@exec ( "nslookup.exe -type=MX $hostname.", $output );
$imx = - 1;
foreach ( $output as $line ) {
$imx ++;
$parts = "";
if (preg_match ( "/^$hostname\tMX preference = ([0-9]+), mail exchanger = (.*)$/", $line, $parts )) {
$mxweight [$imx] = $parts [1];
$mxhosts [$imx] = $parts [2];
}
}
return ($imx != - 1);
}
return false;
}
}
}
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