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

When setting up email headers in PHP, it is important to include necessary headers such as "From", "Reply-To", and "MIME-Version" to ensure successful delivery. Additionally, setting the "Content-Type" header to "text/html" is important if sending HTML emails. Properly formatting the headers and ensuring they comply with email standards can help prevent emails from being marked as spam. 

<?php
$to = "recipient@example.com";
$subject = "Test Email";
$message = "This is a test email.";
$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";

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

Keywords

email headers PHP successful delivery SMTP MIME

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