[Exim] X-Redirect-To

Hi Guys,

i'm using exim 4.30 with exiscan patch with spamassassin 2.63.
I use to forward spam email to a special accounts with acls:

  warn  message = X-Redirect-To: spam@???
        spam = nobody

and router:

scan_redirect:
     driver = redirect
     condition = ${if def:h_X-Redirect-To: {1}{0}}
     headers_add = X-Original-Recipient: $local_part@$domain
     data = $h_X-Redirect-To:
     headers_remove = X-Redirect-To
     redirect_router = local

It worked ever but this time i have a Microsoft Exchange server (i've tried with another one too) and i see that exim delivers
to Exchange but i have no email in my mailbox... sure is a problem of exchange with that header...
have you ever hat this kind of problem? How can i workaround this?

Thanks

Riccardo