What are the differences between sending HTML emails through newslettermax and using the mail() function in PHP?

When sending HTML emails through newslettermax, you can take advantage of their templates and design tools to create visually appealing emails easily. On the other hand, using the mail() function in PHP requires you to manually construct the HTML content of the email and set the appropriate headers. Additionally, newslettermax may offer features like tracking email opens and clicks, which would require additional coding if using the mail() function.

$to = "recipient@example.com";
$subject = "Test HTML Email";
$message = "<html><body><h1>Hello, world!</h1><p>This is a test HTML email.</p></body></html>";
$headers = "MIME-Version: 1.0" . "\r\n";
$headers .= "Content-type:text/html;charset=UTF-8" . "\r\n";
$headers .= "From: sender@example.com" . "\r\n";

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