php给qq邮箱发邮件

<?php
$to = "recipient@qq.com";
$subject = "Test Email";
$message = "This is a test email sent using PHP.";
$headers = "From: sender@example.com\r\n";
$headers .= "Reply-To: sender@example.com\r\n";
$headers .= "MIME-Version: 1.0\r\n";
$headers .= "Content-type: text/html; charset=iso-8859-1\r\n";

// SMTP服务器设置
$smtp_server = "smtp.qq.com";
$smtp_port = 587;
$smtp_username = "your_qq_email@qq.com";
$smtp_password = "your_qq_email_password";

// 创建SMTP连接
$smtp_conn = fsockopen($smtp_server, $smtp_port, $errno, $errstr, 30);
if (!$smtp_conn) {
    echo "SMTP connection failed: " . $errstr . " (" . $errno . ")";
    exit;
}

// 发送HELO命令
fputs($smtp_conn, "HELO " . gethostname() . "\r\n");
fputs($smtp_conn, "STARTTLS\r\n");
stream_set_timeout($smtp_conn, 5);

// 发送认证信息
fputs($smtp_conn, "EHLO " . gethostname() . "\r\n");
fputs($smtp_conn, "AUTH LOGIN\r\n");
fputs($smtp_conn, base64_encode($smtp_username) . "\r\n");
fputs($smtp_conn, base64_encode($smtp_password) . "\r\n");

// 发送邮件头和内容
fputs($smtp_conn, "MAIL FROM: " . $headers . "\r\n");
fputs($smtp_conn, "RCPT TO: " . $to . "\r\n");
fputs($smtp_conn, "DATA\r\n");
fputs($smtp_conn, "Subject: " . $subject . "\r\n");
fputs($smtp_conn, $message . "\r\n.\r\n");
fputs($smtp_conn, "QUIT\r\n");

fclose($smtp_conn);
echo "Email sent successfully!";
?>