PHP form is not sending mail if I use mime type and version in header. How to solve this? [closed]

From: is just another mail header. You need to concatenate this with your current $headers and pass it as one argument to mail():

$headers  = "From: $sender <$senderEmail>\r\n";
$headers .= "MIME-Version: 1.0\r\n";
$headers .= "Content-type: text/html; charset=iso-8859-1\r\n";

// la de da

mail( $recipient, $subject, $mailBody, $headers );