Right now I e-mail regular HTML with
$headers = "MIME-Version: 1.0\r\n";
$headers .= "Content-type: text/html; charset=iso-8859-1\r\n";
$headers .= "From: $email_address";
mail($email, $subject, $content, $headers, "-f$email_address") or die("failed");
How is it possible to add attachments with .pdf, .doc, or .mp3 files?