You have passed wrong arguments to your mail function. Please read the mail()
documentation.
The correct format is
mail ( string $to , string $subject , string $message [, string $additional_headers [, string $additional_parameters ]] )
In your case below is the correct code.
$to = 'info@muzedimage.com';
$email = $_POST['email'] ;
$subject = 'add some subject'; // no subject could lead to email being flagged as spam
$comments1 = $_POST['comments1'] ;
$comments2 = $_POST['comments2'] ;
$message = $comments1 . "\n\n" . $comments2;
$headers = "From: $email";
mail($to, $subject, $message, $headers);
You need to use comments how you want to. In this case I assumed that they both consist the main message.
Hope that helps. And always read documentation!!