/** * Send email through socket * * This static method sends an email through a simple socket connection. * If {@link $smtp_relay} is set, it will be used as a relay to send the * email. Instead, email is sent directly to MX host of domain. * * @param string $to Email destination * @param string $subject Email subject * @param string $message Email message * @param string|array $headers Email headers * @throws Exception */ public static function mail($to, $subject, $message, $headers = null) { $from = self::getFrom($headers); $H = 'Return-Path: <' . $from . ">\r\n"; $from_host = explode('@', $from); $from_host = $from_host[1]; $to_host = explode('@', $to); $to_host = $to_host[1]; if (self::$smtp_relay != null) { $mx = array(gethostbyname(self::$smtp_relay) => 1); } else { $mx = mail::getMX($to_host); } foreach ($mx as $h => $w) { self::$fp = @fsockopen($h, 25, $errno, $errstr, self::$timeout); if (self::$fp !== false) { break; } } if (!is_resource(self::$fp)) { self::$fp = null; throw new Exception('Unable to open socket'); } # We need to read the first line fgets(self::$fp); $data = ''; # HELO cmd if (!self::cmd('HELO ' . $from_host, $data)) { self::quit(); throw new Exception($data); } # MAIL FROM: <...> if (!self::cmd('MAIL FROM: <' . $from . '>', $data)) { self::quit(); throw new Exception($data); } # RCPT TO: <...> if (!self::cmd('RCPT TO: <' . $to . '>', $data)) { self::quit(); throw new Exception($data); } # Compose mail and send it with DATA $H = 'Return-Path: <' . $from . ">\r\n"; $H .= 'To: <' . $to . ">\r\n"; $H .= 'Subject: ' . $subject . "\r\n"; $H .= $headers . "\r\n"; $message = $H . "\r\n\r\n" . $message; if (!self::sendMessage($message, $data)) { self::quit(); throw new Exception($data); } self::quit(); }