Are there specific headers that need to be included when sending emails to AOL addresses to ensure delivery?

When sending emails to AOL addresses, it is important to include specific headers to ensure delivery. One important header to include is the "List-Unsubscribe" header, which allows recipients to easily unsubscribe from future emails. Additionally, it is recommended to include a valid "From" address and to authenticate your emails using SPF and DKIM to improve deliverability.

$to = 'recipient@aol.com';
$subject = 'Your email subject';
$message = 'Your email message';

$headers = "From: yourname@example.com\r\n";
$headers .= "Reply-To: yourname@example.com\r\n";
$headers .= "List-Unsubscribe: <mailto:unsubscribe@example.com>\r\n";
$headers .= "MIME-Version: 1.0\r\n";
$headers .= "Content-type: text/html; charset=iso-8859-1\r\n";

mail($to, $subject, $message, $headers);