Switch to SMTP mail sending via mail2.fi

Replace PHP mail() with direct SMTP authentication through mail2.fi to ensure reliable email delivery. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-03-10 00:31:40 +02:00
parent 501ca783af
commit 982e6c34bd
3 changed files with 149 additions and 12 deletions
--- a/smtp.php
+++ b/smtp.php
@@ -0,0 +1,135 @@
+<?php
+/**
+ * Yksinkertainen SMTP-lähetys ilman ulkoisia kirjastoja.
+ * Tukee STARTTLS + AUTH LOGIN.
+ */
+function smtp_send($to, $subject, $body, $replyTo = '') {
+    require_once __DIR__ . '/config.php';
+
+    $host = SMTP_HOST;
+    $port = SMTP_PORT;
+    $user = SMTP_USER;
+    $pass = SMTP_PASS;
+    $from = SMTP_FROM;
+    $fromName = defined('SMTP_FROM_NAME') ? SMTP_FROM_NAME : '';
+
+    $errors = [];
+
+    // Connect
+    $socket = @fsockopen($host, $port, $errno, $errstr, 10);
+    if (!$socket) {
+        return ['ok' => false, 'error' => "Connection failed: $errstr ($errno)"];
+    }
+
+    $resp = fgets($socket, 512);
+    if (substr($resp, 0, 3) !== '220') {
+        fclose($socket);
+        return ['ok' => false, 'error' => "Server greeting failed: $resp"];
+    }
+
+    // EHLO
+    fwrite($socket, "EHLO konesaliturku.fi\r\n");
+    $resp = '';
+    while ($line = fgets($socket, 512)) {
+        $resp .= $line;
+        if ($line[3] === ' ') break;
+    }
+
+    // STARTTLS
+    fwrite($socket, "STARTTLS\r\n");
+    $resp = fgets($socket, 512);
+    if (substr($resp, 0, 3) !== '220') {
+        fclose($socket);
+        return ['ok' => false, 'error' => "STARTTLS failed: $resp"];
+    }
+
+    // Enable TLS
+    $crypto = stream_socket_enable_crypto($socket, true, STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT | STREAM_CRYPTO_METHOD_TLSv1_3_CLIENT);
+    if (!$crypto) {
+        fclose($socket);
+        return ['ok' => false, 'error' => "TLS handshake failed"];
+    }
+
+    // EHLO again after TLS
+    fwrite($socket, "EHLO konesaliturku.fi\r\n");
+    $resp = '';
+    while ($line = fgets($socket, 512)) {
+        $resp .= $line;
+        if ($line[3] === ' ') break;
+    }
+
+    // AUTH LOGIN
+    fwrite($socket, "AUTH LOGIN\r\n");
+    $resp = fgets($socket, 512);
+    if (substr($resp, 0, 3) !== '334') {
+        fclose($socket);
+        return ['ok' => false, 'error' => "AUTH failed: $resp"];
+    }
+
+    fwrite($socket, base64_encode($user) . "\r\n");
+    $resp = fgets($socket, 512);
+    if (substr($resp, 0, 3) !== '334') {
+        fclose($socket);
+        return ['ok' => false, 'error' => "AUTH user failed: $resp"];
+    }
+
+    fwrite($socket, base64_encode($pass) . "\r\n");
+    $resp = fgets($socket, 512);
+    if (substr($resp, 0, 3) !== '235') {
+        fclose($socket);
+        return ['ok' => false, 'error' => "AUTH password failed: $resp"];
+    }
+
+    // MAIL FROM
+    fwrite($socket, "MAIL FROM:<$from>\r\n");
+    $resp = fgets($socket, 512);
+    if (substr($resp, 0, 3) !== '250') {
+        fclose($socket);
+        return ['ok' => false, 'error' => "MAIL FROM failed: $resp"];
+    }
+
+    // RCPT TO
+    fwrite($socket, "RCPT TO:<$to>\r\n");
+    $resp = fgets($socket, 512);
+    if (substr($resp, 0, 3) !== '250') {
+        fclose($socket);
+        return ['ok' => false, 'error' => "RCPT TO failed: $resp"];
+    }
+
+    // DATA
+    fwrite($socket, "DATA\r\n");
+    $resp = fgets($socket, 512);
+    if (substr($resp, 0, 3) !== '354') {
+        fclose($socket);
+        return ['ok' => false, 'error' => "DATA failed: $resp"];
+    }
+
+    // Build message
+    $fromHeader = $fromName ? "\"$fromName\" <$from>" : $from;
+    $msg = "From: $fromHeader\r\n";
+    $msg .= "To: $to\r\n";
+    $msg .= "Subject: =?UTF-8?B?" . base64_encode($subject) . "?=\r\n";
+    if ($replyTo) {
+        $msg .= "Reply-To: $replyTo\r\n";
+    }
+    $msg .= "MIME-Version: 1.0\r\n";
+    $msg .= "Content-Type: text/plain; charset=UTF-8\r\n";
+    $msg .= "Content-Transfer-Encoding: 8bit\r\n";
+    $msg .= "Date: " . date('r') . "\r\n";
+    $msg .= "\r\n";
+    $msg .= $body;
+    $msg .= "\r\n.\r\n";
+
+    fwrite($socket, $msg);
+    $resp = fgets($socket, 512);
+
+    // QUIT
+    fwrite($socket, "QUIT\r\n");
+    fclose($socket);
+
+    if (substr($resp, 0, 3) === '250') {
+        return ['ok' => true];
+    }
+
+    return ['ok' => false, 'error' => "Send failed: $resp"];
+}