Created
August 4, 2014 13:58
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Check email addresses through SMTP
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<?php | |
class SmtpEmailChecker | |
{ | |
protected $from; | |
protected $code; | |
/** | |
* @return mixed | |
*/ | |
public function getCode() | |
{ | |
return $this->code; | |
} | |
public function __construct($from) | |
{ | |
$this->from = $from; | |
} | |
public function check($email) | |
{ | |
if (strpos($email, '@') === false) { | |
return false; | |
} | |
$mxHosts = []; | |
$weight = []; | |
getmxrr(explode('@', $email)[1], $mxHosts, $weight); | |
$mxHosts = array_combine($weight, $mxHosts); | |
ksort($mxHosts); | |
$socket = false; | |
foreach ($mxHosts as $mxHost) { | |
try { | |
$socket = fsockopen($mxHost, 25, $errno, $errstr, 5); | |
stream_set_timeout($socket, 5); | |
} | |
catch (Exception $e) { | |
} | |
if ($socket) | |
{ | |
break; | |
} | |
} | |
if ($socket) { | |
try { | |
$reply = fread($socket, 2082); | |
$helloCode = intval(substr($reply, 0, 3)); | |
if ($helloCode != 220) { | |
$this->code = 0; | |
return false; | |
} | |
else { | |
fwrite($socket, "HELO " . gethostname() . "\r\n"); | |
fread($socket, 2082); | |
fwrite($socket, "MAIL FROM: <" . $this->from . ">" . "\r\n"); | |
fread($socket, 2082); | |
fwrite($socket, "RCPT TO: <" . $email . ">" . "\r\n"); | |
$response = fread($socket, 2082); | |
fwrite($socket, "quit" . "\r\n"); | |
fread($socket, 2082); | |
fclose($socket); | |
$code = intval(substr($response, 0, 3)); | |
$this->code = $code; | |
switch ($code) { | |
case 250: | |
return true; | |
case 451: | |
return true; | |
case 550: | |
return false; | |
default: | |
return false; | |
} | |
} | |
} | |
catch (Exception $e) { | |
error_log($e->getMessage()); | |
} | |
} | |
$this->code = 0; | |
return false; | |
} | |
} |
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