i'm use:
$from_name=getenv("kamyshew");
	$from_address=getenv("kamyshew")."@".getenv("admin");
	$reply_name=$from_name;
	$reply_address=$from_address;
	$reply_address=$from_address;
	$error_delivery_name=$from_name;
	$error_delivery_address=$from_address;
	$to_name="admin";
	$to_address="
[email protected]";
	$subject="Testing Manuel Lemos' MIME Email composition PHP class: some non-ASCII characters БиОхЬ in a message header";
	$message="Hello ".strtok($to_name," ").",\n\nThis message is just to let you know that your e-mail sending class is working as expected.\n\nHere's some non-ASCII characters БиОхЬ in the message body to let you see if they are sent properly encoded.\n\nThank you,\n$from_name";
	$email_message=new email_message_class;
	$email_message->SetEncodedEmailHeader("To",$to_address,$to_name);
	$email_message->SetEncodedEmailHeader("From",$from_address,$from_name);
	$email_message->SetEncodedEmailHeader("Reply-To",$reply_address,$reply_name);
/*
	Set the Return-Path header to define the envelope sender address to which bounced messages are delivered.
	If you are using Windows, you need to use the smtp_message_class to set the return-path address.
*/
	if(defined("PHP_OS")
	&& strcmp(substr(PHP_OS,0,3),"WIN"))
		$email_message->SetHeader("Return-Path",$error_delivery_address);
	$email_message->SetEncodedEmailHeader("Errors-To",$error_delivery_address,$error_delivery_name);
	$email_message->SetEncodedHeader("Subject",$subject);
	$email_message->AddQuotedPrintableTextPart($email_message->WrapText($message));
	$error=$email_message->Send();
	if(strcmp($error,""))
		echo "Error: $error\n";
php error:
Warning: mail() [function.mail]: SMTP server response: 501 Mailbox syntax incorrect - <admin <
[email protected]>> in D:\xampp\htdocs\avia\classs\email_message.class.php on line 356
server respondent: 
>17.09.2006 19:55:00 SMTPSERV 0001 RCPT TO:<admin <
[email protected]>>
<17.09.2006 19:55:00 SMTPSERV 0001 501 Mailbox syntax incorrect - <admin <
[email protected]>>