php如何实现邮件分发功能

$projectEmail = 'project@email.com'; // 项目邮箱
$personalEmail = 'personal@email.com'; // 私人邮箱
$spamEmail = 'spam@email.com'; // 垃圾邮件
 
$to = $typeOfEmail === 'project' ? $projectEmail : ($typeOfEmail === 'personal' ? $personalEmail : $spamEmail);
$subject = '邮件主题';
$message = '邮件内容';
$headers = 'From: sender@email.com' . "
" .
    'Reply-To: sender@email.com' . "
" .
    'X-Mailer: PHP/' . phpversion();
 
mail($to, $subject, $message, $headers);