my $mail = build MIME::Entity Type=>"multipart/mixed"; 
			$mail->head->add('To', $error_reciver); 
			$mail->head->add('From', $error_sender); 
			$mail->head->add('Reply-To', $error_sender); 
			$mail->head->add('Subject', 'something'); 
			$mail->head->add('Message-ID', '1'); 
			$mail->head->add('Return-path', $error_sender); 
			$mail->attach( 
				Type => 'text/plain', 
				Charset => 'UTF-8', 
				Encoding => 'quoted-printable', 
				Data => [ "ggggg  \n" ], 
		); 
		$mail->smtpsend('MailFrom' => $error_sender, 'To' => $error_reciver, 'Return-path' => $error_sender) or die($mail->dump_skeleton(\*STDERR));

Content-type: multipart/mixed 
Effective-type: multipart/mixed 
Body-file: NONE 
Subject: something 
Num-parts: 1 
-- 
    Content-type: text/plain 
    Effective-type: text/plain 
    Body-file: NONE 
    -- 
Died at ./contract-end.pl line 107.