email - How do I prevent mails sent through PHP mail() from going to spam?

Question

This question already has answers here:

Answer 1

You must to add a needle headers:

Sample code :

$headers = "From: [email protected]
";
$headers .= "Reply-To: [email protected]
";
$headers .= "Return-Path: [email protected]
";
$headers .= "CC: [email protected]
";
$headers .= "BCC: [email protected]
";

if ( mail($to,$subject,$message,$headers) ) {
   echo "The email has been sent!";
   } else {
   echo "The email has failed!";
   }
?>