Created
May 20, 2025 05:38
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Test SSL on email (IMAP) servers.
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| <?php | |
| // This tool is 80% ChatGPT code. Just so you know. | |
| error_reporting( -1 ); | |
| ini_set('display_errors', 'on'); | |
| // === CONFIGURATION === | |
| $config = [ | |
| 'servers' => [ 'srv1.mail.example.com', 'srv2.mail.example.com', ], | |
| 'timeout' => 10, // seconds | |
| ]; | |
| // === FUNCTIONS === | |
| function check_imap_ssl($host, $timeout) { | |
| $context = stream_context_create([ | |
| 'ssl' => [ | |
| 'verify_peer' => true, | |
| 'verify_peer_name' => true, | |
| 'allow_self_signed' => false, | |
| 'capture_peer_cert' => true, | |
| ] | |
| ]); | |
| $fp = @stream_socket_client("ssl://$host:993", $errno, $errstr, $timeout, STREAM_CLIENT_CONNECT, $context); | |
| if ($fp === false) return false; | |
| fclose($fp); | |
| return true; | |
| } | |
| function check_imap_tls($host, $timeout) { | |
| $fp = @stream_socket_client("tcp://$host:143", $errno, $errstr, $timeout); | |
| if ($fp === false) return false; | |
| // Read initial banner | |
| $banner = fgets($fp, 512); | |
| if ($banner === false || stripos($banner, '* OK') === false) { | |
| fclose($fp); | |
| return false; | |
| } | |
| // Send STARTTLS command | |
| fwrite($fp, "a001 STARTTLS\r\n"); | |
| $response = fgets($fp, 512); | |
| if (stripos($response, 'OK') === false) { | |
| fclose($fp); | |
| return false; | |
| } | |
| try { | |
| ob_start(); | |
| $cryptoEnabled = stream_socket_enable_crypto($fp, true, STREAM_CRYPTO_METHOD_TLS_CLIENT); | |
| $m = ob_get_clean(); | |
| if ($m && preg_match('/stream_socket_enable_crypto\(\): (.+) in </', $m, $m2)) { | |
| check_imap_set_error( $m2[1]); | |
| } | |
| } catch (Exception $e) { | |
| check_imap_set_error( $e->error_message ); | |
| return false; | |
| } | |
| // Upgrade to TLS | |
| fclose($fp); | |
| return $cryptoEnabled === true; | |
| } | |
| function check_imap_set_error( $msg = null ) { | |
| static $m = null; | |
| if ($msg) { | |
| $m = $msg; | |
| } | |
| return $m; | |
| } | |
| function render_status($server, $label, $result) { | |
| $color = $result ? 'green' : 'red'; | |
| $status = $result ? '✅ SUCCESS' : '❌ FAILED ' . check_imap_set_error(); | |
| echo "<tr><th>$server</th><td>$label</td><td style='color:$color;font-weight:bold;'>$status</td></tr>\n"; | |
| } | |
| ?> | |
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>IMAP Connection Check</title> | |
| <style> | |
| body { font-family: sans-serif; margin: 2em; } | |
| table { border-collapse: collapse; width: 50%; } | |
| th, td { padding: 8px 12px; border: 1px solid #ccc; } | |
| th { background-color: #f4f4f4; } | |
| </style> | |
| </head> | |
| <body> | |
| <h1>IMAP Connection Status</h1> | |
| <table> | |
| <tr><th>Server</th><th>Connection Type</th><th>Status</th></tr> | |
| <?php | |
| foreach ($config['servers'] as $server) { | |
| $sslOk = check_imap_ssl($server, $config['timeout']); | |
| $tlsOk = check_imap_tls($server, $config['timeout']); | |
| render_status($server, "IMAP over SSL (port 993)", $sslOk); | |
| render_status($server, "IMAP with STARTTLS (port 143)", $tlsOk); | |
| } | |
| ?> | |
| </table> | |
| </body> | |
| </html> |
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