I want to comment that I USE the ISP SMTP , not IIS SMTP
and also not work..

Please add a short example script here which clearly shows
your problem.

<?
function SendHtmlMsg($To,$From,$Sendername,$Receivername,$subject,$msg){
	mail($To, $subject, $msg,
	     "To: $Receivername <$To>\n" .
		 "From: $Sendername <$From>\n" .     
		 "X-Mailer: PHP 4.3\n".
		 "MIME-Version: 1.0\n" .
		 "Content-type: text/html; charset=-1256");
}
			 $From="info@site.com";
			 $Sendername = "Person";
			 $To = "albaity@php.net";
			 $Receivername = "Test Person";
			 $subject ="Test";
			 $msg = "Test<br/>Test";
SendHtmlMsg($To,$From,$Sendername,$Receivername,$subject,$msg);
?>

PLEASE don't use the 'Add comment' link!!!
It's your own report, use the 'Edit submission' ALWAYS.

Anyway, this works fine for me:

mail('"someone somehwere" <someone@somewhere.com>', 'subject', 'message');

I take details from :
http://www.php.net/manual/en/function.mail.php

because it happen with me also

the smtp server with iis5 does not support a TO NAME,
you can send it to an email but not along with a name.
to say $to = "Miki <Miki@email.com>"; would not be accepted and you will
get an error 501 Invalid address.
if you see this error, just try NOT sending emails with a TO name, only
the email should be entered

That is given to me..
SMTP server response: 550 5.1.1 ... User unknown in C:\Projects\fnoon\functions.php on 138
I want to comment that I USE the ISP SMTP , not IIS SMTP
and also not work..

Now I think I understand what the problem ..
THAT BECAUSE I USE ARABIC EMAIL FORMAT ..
SORRY FOR MAKE NOISE AND VERY THMKS TO YOU SNIPER :P

I take details from :
http://www.php.net/manual/en/function.mail.php

because it happen with me also

the smtp server with iis5 does not support a TO NAME,
you can send it to an email but not along with a name.
to say $to = "Miki <Miki@email.com>"; would not be accepted and you will
get an error 501 Invalid address.
if you see this error, just try NOT sending emails with a TO name, only
the email should be entered

That is given to me..
SMTP server response: 550 5.1.1 ... User unknown in C:\Projects\fnoon\functions.php on 138
I want to comment that I USE the ISP SMTP , not IIS SMTP
and also not work..

Now I think I understand what the problem ..
THAT BECAUSE I USE ARABIC EMAIL FORMAT ..
SORRY FOR MAKE NOISE AND VERY THMKS TO YOU SNIPER :P

So does it work when it's send as part of the headers?

I do not understand your Q

Does this work:

<?php 
mail('', 'subject', 'message', "To: \"Some Name\" <someone@somehwere.com>"); 
?>

its work , but the problem was if the name \"Some Name\"
writed in arabic or chinese it will not work 
thats is the probelm

its work , but the problem was if the name \"Some Name\"
writed in arabic or chinese it will not work 
thats is the probelm

sorry its work , the bug is from me 
sorry for noise again

Not a bug in PHP -> bogus.