[CentOS] Postfix question: How to reject email with a certain subject header

Gilbert Sebenste wrote:
> Hello everyone,
>
> Occasionally I get emails which have a subject header of "Rejected posting 
> to Blah", from a listserv I am on. Without going into a 10 page diatribe 
> of why, I'd like to reject these automatically, sending them to /dev/null. 
> I used to run Sendmail and that was pretty easy to do. How can I do this 
> under Postfix under CentOS 5.3?
>
> Any help is appreciated. Thanks!
>   

are you using procmail as the delivery agent?  if so, you'd add 
something like the following to your ~/.procmailrc  ...

    :0:
    * ^Subject:.*Rejected posting to Blah.*
        /dev/null