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SMTP STARTTLS + auth sivusto@cuitunet.fi kautta smtp.mail2.fi:587

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Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Jukka Lampikoski
2026-03-13 09:18:41 +02:00
parent 0f60ea46d4
commit 288327ec51
1 changed files with 54 additions and 28 deletions
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78
send.php
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@@ -81,47 +81,74 @@ $headers .= "Reply-To: $email\r\n";
$headers .= "Content-Type: text/plain; charset=UTF-8\r\n";
$headers .= "X-Mailer: Cuitunet-Web\r\n";
// Lähetys suoraan SMTP:llä MX-palvelimelle (ohittaa Pleskin postfixin)
function sendViaSMTP(string $from, string $to, string $subject, string $body, string $replyTo): string {
$mx = 'mx.mail2.fi';
$port = 25;
// SMTP-lähetys mail2.fi:n kautta (STARTTLS + auth)
function sendViaSMTP(string $to, string $subject, string $body, string $replyTo): string {
$smtpHost = 'smtp.mail2.fi';
$smtpPort = 587;
$smtpUser = 'sivusto@cuitunet.fi';
$smtpPass = 'Passus123!';
$fromEmail = 'sivusto@cuitunet.fi';
$fromName = 'Cuitunet Saatavuuskysely';
$hostname = 'cuitunet.fi';
$sock = @fsockopen($mx, $port, $errno, $errstr, 10);
if (!$sock) return "Yhteys MX-palvelimeen epäonnistui: $errstr ($errno)";
$sock = @fsockopen($smtpHost, $smtpPort, $errno, $errstr, 10);
if (!$sock) return "SMTP-yhteys epäonnistui: $errstr ($errno)";
$resp = fgets($sock, 512);
if (substr($resp, 0, 3) !== '220') { fclose($sock); return "MX hylkäsi yhteyden: $resp"; }
if (substr($resp, 0, 3) !== '220') { fclose($sock); return "SMTP hylkäsi: $resp"; }
$cmds = [
"EHLO $hostname",
"MAIL FROM:<$from>",
"RCPT TO:<$to>",
"DATA",
];
foreach ($cmds as $cmd) {
fwrite($sock, "$cmd\r\n");
// EHLO
fwrite($sock, "EHLO $hostname\r\n");
$resp = fgets($sock, 512);
$code = substr($resp, 0, 3);
// EHLO voi palauttaa monta riviä
if ($cmd === "EHLO $hostname") {
while (substr($resp, 3, 1) === '-') { $resp = fgets($sock, 512); }
// STARTTLS
fwrite($sock, "STARTTLS\r\n");
$resp = fgets($sock, 512);
if (substr($resp, 0, 3) !== '220') { fclose($sock); return "STARTTLS epäonnistui: $resp"; }
if (!stream_socket_enable_crypto($sock, true, STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT | STREAM_CRYPTO_METHOD_TLSv1_3_CLIENT)) {
fclose($sock); return "TLS handshake epäonnistui";
}
if ($cmd === 'DATA' && $code !== '354') { fwrite($sock, "QUIT\r\n"); fclose($sock); return "DATA hylätty: $resp"; }
elseif ($cmd !== 'DATA' && $code[0] !== '2') { fwrite($sock, "QUIT\r\n"); fclose($sock); return "SMTP virhe ($cmd): $resp"; }
}
// EHLO uudelleen TLS:n jälkeen
fwrite($sock, "EHLO $hostname\r\n");
$resp = fgets($sock, 512);
while (substr($resp, 3, 1) === '-') { $resp = fgets($sock, 512); }
// AUTH LOGIN
fwrite($sock, "AUTH LOGIN\r\n");
$resp = fgets($sock, 512);
if (substr($resp, 0, 3) !== '334') { fclose($sock); return "AUTH ei tuettu: $resp"; }
fwrite($sock, base64_encode($smtpUser) . "\r\n");
$resp = fgets($sock, 512);
if (substr($resp, 0, 3) !== '334') { fclose($sock); return "Käyttäjänimi hylätty: $resp"; }
fwrite($sock, base64_encode($smtpPass) . "\r\n");
$resp = fgets($sock, 512);
if (substr($resp, 0, 3) !== '235') { fclose($sock); return "Kirjautuminen epäonnistui: $resp"; }
// MAIL FROM / RCPT TO / DATA
fwrite($sock, "MAIL FROM:<$fromEmail>\r\n");
$resp = fgets($sock, 512);
if ($resp[0] !== '2') { fclose($sock); return "MAIL FROM hylätty: $resp"; }
fwrite($sock, "RCPT TO:<$to>\r\n");
$resp = fgets($sock, 512);
if ($resp[0] !== '2') { fclose($sock); return "RCPT TO hylätty: $resp"; }
fwrite($sock, "DATA\r\n");
$resp = fgets($sock, 512);
if (substr($resp, 0, 3) !== '354') { fclose($sock); return "DATA hylätty: $resp"; }
// Viesti
$msg = "From: $from\r\n";
$msg = "From: $fromName <$fromEmail>\r\n";
$msg .= "To: $to\r\n";
$msg .= "Reply-To: $replyTo\r\n";
$msg .= "Subject: $subject\r\n";
$msg .= "Content-Type: text/plain; charset=UTF-8\r\n";
$msg .= "X-Mailer: Cuitunet-Web\r\n";
$msg .= "Date: " . date('r') . "\r\n";
$msg .= "Message-ID: <" . uniqid('cuitunet-') . "@$hostname>\r\n";
$msg .= "\r\n";
$msg .= str_replace("\n.", "\n..", $body); // Dot-stuffing
$msg .= str_replace("\n.", "\n..", $body);
$msg .= "\r\n.\r\n";
fwrite($sock, $msg);
@@ -132,8 +159,7 @@ function sendViaSMTP(string $from, string $to, string $subject, string $body, st
return (substr($resp, 0, 3) === '250') ? '' : "Lähetys epäonnistui: $resp";
}
$fromAddr = 'sivusto@cuitunet.fi';
$smtpError = sendViaSMTP($fromAddr, $to, $subject, $body, $email);
$smtpError = sendViaSMTP($to, $subject, $body, $email);
if (empty($smtpError)) {
// Tallenna rate limit