the default mime type is text/plain for emails. you only need to specify a mime type if you DONT want it to be plain text, like for example, you want it to be html.
you can google for mime types to learn more about them if you want.
have you tried sending the email to some different email addresses?
you might also want to try this
$result = mail($emailAddr, $subject, $message, "From: $EMail\r\n");
var_dump($result);