How to know that subscriber has received my newsletter?

[sbabanli]

Hi,
My question may be very simple
How to know that subscriber has received my letter (i need get message or mail from my script)?
I need just to know statistics of my subscribers receiving (even not opening it) my newsletter.I need just code in PHP.
best regards

[rajarajan2017]

if (mail($to, $subject, $message,
	"To: Natarajan <$to>\n".
	"From: $name <$email>\n".
	//"cc: Raja Rajan<$cc>\n" .
	"X-Mailer: PHP 5.x\n".
	"MIME-Version: 1.0\n" .
	"Content-type: text/html; charset=iso-8859-1"))
	echo ('<p>[B]Mail sent successfully.[/B]</p>');
else echo('<p>[B]Mail could not be sent[/B].</p>');

Tne code itself confirm you the newsletter has been received by your subscriber.

[sbabanli]

hi rajarajan07,
Does it mean this code will return error message if mail address even not existing as [e-mail]. if validate it as mail its OK but this main not real.
regards