Вам необходимо получить имена хостов dns mx для домена, на который вы хотите отправить электронное письмо (email@boo.xx-> domain boo.xx):
function getMX($hostname = "boo.xx", $show = 0){
if(dns_get_mx($hostname, $mxhosts, $weights)) {
$i = 0;
$mxList = NULL;
foreach($mxhosts as $key => $host) {
if($show == 1) echo "Hostname: $host (Weight: {$weights[$key]}) <br>";
$ip = gethostbyname($host);
if($show == 1) echo "IP " . $ip . "\n<br>";
if($show == 1) echo "IP " . gethostbyaddr($ip) . "\n<br>";
$mxList[$i]['host'] = $host;
$mxList[$i]['ip'] = $ip;
$mxList[$i]['weight'] = $weights[$key];
$i++;
}
return $mxList;
} else {
echo "Could not find any MX records for $hostname\n";
}
}
Теперь у вас есть список с хостами mx, тогда вам нужно:
Отправка электронной почты на порт 25 на этот хост (всегда порт 25 и без аутентификации) с phpmailer или сокет-клиентом (пример с поддержкой и аутентификацией ssl / tls):
<?php
// Send with smtp ssl
// ini_set("SMTP","ssl://smtp.gmail.com");
// ini_set("smtp_port","465");
// Login email and password
$login = "your-email@cool.xx";
$pass = "123456";
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);
$ctx = stream_context_create();
stream_context_set_option($ctx, 'ssl', 'verify_peer', false);
stream_context_set_option($ctx, 'ssl', 'verify_peer_name', false);
try{
// echo $socket = stream_socket_client('ssl://smtp.gmail.com:587', $err, $errstr, 60, STREAM_CLIENT_CONNECT, $ctx);
echo $socket = stream_socket_client('tcp://smtp.gmail.com:587', $err, $errstr, 60, STREAM_CLIENT_CONNECT, $ctx);
if (!$socket) {
print "Failed to connect $err $errstr\n";
return;
}else{
// Http
// fwrite($socket, "GET / HTTP/1.0\r\nHost: www.example.com\r\nAccept: */*\r\n\r\n");
// Smtp
echo fread($socket,8192);
echo fwrite($socket, "EHLO cool.xx\r\n");
echo fread($socket,8192);
// Start tls connection
echo fwrite($socket, "STARTTLS\r\n");
echo fread($socket,8192);
echo stream_socket_enable_crypto($socket, true, STREAM_CRYPTO_METHOD_SSLv23_CLIENT);
// Send ehlo
echo fwrite($socket, "EHLO cool.xx\r\n");
echo fread($socket,8192);
// echo fwrite($socket, "MAIL FROM: <hello@cool.com>\r\n");
// echo fread($socket,8192);
echo fwrite($socket, "AUTH LOGIN\r\n");
echo fread($socket,8192);
echo fwrite($socket, base64_encode($login)."\r\n");
echo fread($socket,8192);
echo fwrite($socket, base64_encode($pass)."\r\n");
echo fread($socket,8192);
echo fwrite($socket, "rcpt to: <to-email@boome.com>\r\n");
echo fread($socket,8192);
echo fwrite($socket, "DATA\n");
echo fread($socket,8192);
echo fwrite($socket, "Date: ".time()."\r\nTo: <to-email@boome.com>\r\nFrom:<zour-email@cool.xx\r\nSubject:Hello from php socket tls\r\n.\r\n");
echo fread($socket,8192);
echo fwrite($socket, "quit \n");
echo fread($socket,8192);
/* Turn off encryption for the rest */
// stream_socket_enable_crypto($fp, false);
fclose($socket);
}
}catch(Exception $e){
echo $e;
}
И безаутентификация
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);
$ctx = stream_context_create();
stream_context_set_option($ctx, 'ssl', 'verify_peer', false);
stream_context_set_option($ctx, 'ssl', 'verify_peer_name', false);
try{
// echo $socket = stream_socket_client('ssl://smtp.gmail.com:587', $err, $errstr, 60, STREAM_CLIENT_CONNECT, $ctx);
echo $socket = stream_socket_client('tcp://mxhost.boo.xx:25', $err, $errstr, 60, STREAM_CLIENT_CONNECT, $ctx);
if (!$socket) {
print "Failed to connect $err $errstr\n";
return;
}else{
// Http
// fwrite($socket, "GET / HTTP/1.0\r\nHost: www.example.com\r\nAccept: */*\r\n\r\n");
// Smtp
echo fread($socket,8192);
echo fwrite($socket, "EHLO cool.xx\r\n");
echo fread($socket,8192);
// Start tls connection
echo fwrite($socket, "STARTTLS\r\n");
echo fread($socket,8192);
echo stream_socket_enable_crypto($socket, true, STREAM_CRYPTO_METHOD_SSLv23_CLIENT);
// Send ehlo
echo fwrite($socket, "EHLO cool.xx\r\n");
echo fread($socket,8192);
echo fwrite($socket, "MAIL FROM: <hello@cool.com>\r\n");
echo fread($socket,8192);
//echo fwrite($socket, "AUTH LOGIN\r\n");
//echo fread($socket,8192);
//echo fwrite($socket, base64_encode($login)."\r\n");
//echo fread($socket,8192);
//echo fwrite($socket, base64_encode($pass)."\r\n");
//echo fread($socket,8192);
echo fwrite($socket, "rcpt to: <to-email@boome.com>\r\n");
echo fread($socket,8192);
echo fwrite($socket, "DATA\n");
echo fread($socket,8192);
echo fwrite($socket, "Date: ".time()."\r\nTo: <to-email@boome.com>\r\nFrom:<zour-email@cool.xx\r\nSubject:Hello from php socket tls\r\n.\r\n");
echo fread($socket,8192);
echo fwrite($socket, "quit \n");
echo fread($socket,8192);
/* Turn off encryption for the rest */
// stream_socket_enable_crypto($fp, false);
fclose($socket);
}
}catch(Exception $e){
echo $e;
}