Вы должны настроить SMTP на своем сервере. Вы можете бесплатно использовать G Suite SMTP Google:
IsSMTP(); // telling the class to use SMTP
$mail->SMTPAuth = true; // enable SMTP authentication
$mail->SMTPSecure = "ssl"; // sets the prefix to the servier
$mail->Host = "smtp.gmail.com"; // sets GMAIL as the SMTP server
$mail->Port = 465; // set the SMTP port for the GMAIL server
$mail->Username = "your-gmail-account@gmail.com"; // GMAIL username
$mail->Password = "your-gmail-password"; // GMAIL password
}
// Typical mail data
$mail->AddAddress($email, $name);
$mail->SetFrom($email_from, $name_from);
$mail->Subject = "My Subject";
$mail->Body = "Mail contents";
try{
$mail->Send();
echo "Success!";
} catch(Exception $e){
// Something went bad
echo "Fail :(";
}
?>
Подробнее о PHPMailer
здесь .