PHP：如何通过SMTP与邮件服务器通信？

How to communicate with mail server thru SMTP using PHP?

Open a socket using fsockopen. Write to the socket using fwrite. Read from the socket line by line using fgets or byte by byte using fread.

Look up the documentation for mail().

Take a look at PHPMailer.

Maybe you are looking for this:

These examples use the Pear Mail Package: http://pear.php.net/package/Mail

http://email.about.com/od/emailprogrammingtips/qt/PHP_Email_SMTP_Authentication.htm http://www.cyberciti.biz/tips/howto-php-send-email-via-smtp-authentication.html

take a look at Zend_Mail it had every function needed to do with mail

-http://framework.zend.com

-http://framework.zend.com/manual/en/zend.mail.html

I wrote this snippet for the Email() method of my personal PHP framework, phunction, maybe it can be of some help. The regex I used is able to validate each individual reply from the SMTP server.

if (isset($smtp) === true)
{
    $result = null;
    $stream = stream_socket_client($smtp);

    if (is_resource($stream) === true)
    {
        $data = array('HELO ' . $_SERVER['HTTP_HOST']);
        $result .= substr(ltrim(fread($stream, 8192)), 0, 3);

        if (preg_match('~^220~', $result) > 0)
        {
            $auth = array_slice(func_get_args(), 8, 2);

            if (count($auth) == 2)
            {
                $data = array_merge($data, array('AUTH LOGIN'), array_map('base64_encode', $auth));
            }

            $data[] = sprintf('MAIL FROM: <%s>', implode('', array_slice($from, 0, 1)));

            foreach (array_merge(array_values($to), array_values($cc), array_values($bcc)) as $value)
            {
                $data[] = sprintf('RCPT TO: <%s>', $value);
            }

            $data[] = 'DATA';
            $data[] = implode("
", array_merge(array_diff_key($header, array('Bcc' => true)), array(''), $content, array('.')));
            $data[] = 'QUIT';

            while (preg_match('~^220(?>250(?>(?>334){1,2}(?>235)?)?(?>(?>250){1,}(?>354(?>250)?)?)?)?$~', $result) > 0)
            {
                if (fwrite($stream, array_shift($data) . "
") !== false)
                {
                    $result .= substr(ltrim(fread($stream, 8192)), 0, 3);
                }
            }

            if (count($data) > 0)
            {
                if (fwrite($stream, array_pop($data) . "
") !== false)
                {
                    $result .= substr(ltrim(fread($stream, 8192)), 0, 3);
                }
            }
        }

        fclose($stream);
    }

    return (preg_match('~221$~', $result) > 0) ? true : false;
}