Are there any best practices for formatting email headers in PHP to ensure successful delivery?

When sending emails using PHP, it is important to format the email headers correctly to ensure successful delivery. One common best practice is to include the "From" header with a valid email address and name. Additionally, setting the "Reply-To" header can help recipients easily respond to the email. Finally, make sure to include the "MIME-Version" and "Content-Type" headers to specify the email content type. 

$to = "recipient@example.com";
$subject = "Your Subject Here";
$message = "Your Message Here";
$headers = "From: Your Name <your_email@example.com>\r\n";
$headers .= "Reply-To: Your Name <your_email@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);

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PHP email headers formatting successful delivery best practices

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