Stopping messages without To: or Cc: header(s)

[Hugo van der Kooij]

Hi,

I want to stop messages without a To: or Cc: header. Postfix will 
translate them to:
To: undisclosed-recipients:;

In the postfix cleanup(8) manual page I found this:

        undisclosed_recipients_header   (To:   undisclosed-recipi-
        ents:;)
               Message  header  that the Postfix cleanup(8) server
               inserts when a message contains no To: or Cc:  mes-
               sage header.

I would prefer to kill them at postfix entry before they even get 
accepted. But if this is not possible I would like to kill them in 
MailScanner as high scoring spam.

Any suggestion?

Hugo.