Can’t send mail

Community support
#1

I unable to send to from my free domain, can you pls help
this is my code

<?php $to = "username@rediffmail.com"; $subject = "test subject"; $body = "YOUR BODY GOES HERE"; $headers = "MIME-Version: 1.0 Content-Type: text/html; charset=UTF-8"; mail ($to, $subject, $body, $headers); ?>
#2

@rajaalways Mail script seems fine, have you check spam/junk box??

#3

Yes, I have checked the spam and junk also. but I haven’t received any mail.