postfix X-Original-To problem

[Tung Siu Fai]

I got a problem on MailScanner + Postfix

I want every message add a X-Original-To header to each messages. I add the flag
"O" at master.cf, everything is ok

The email after process by MailScanner and put the email back to incoming queue.
The deliver postfix cannot add the  X-Original-To, when there are  more then one
recipient. only 1 email will add  X-Original-To header correctly, other email will add " X-
Original-To : unknow"

the log as following :

postfix/pipe[11133]: 485C03823FD: to=<abc at myhost.com>, orig_to=<unknown>,
relay=cyrus, delay=11, status=sent (mail.myhost.com)

already add local_destination_recipient_limit = 1

I think the problem is the mailscanner write postfix queue file format not corret, anyone
can tell me how to fix it ?

Thanks