[Exim] exim, spamd and message greater than 80k

Hi Guys,

i'm using exim 4.30 with spamassassin 2.63 with this acl:

  warn  message = X-Spam-Score: $spam_score ($spam_bar)
        condition = ${if <{$message_size}{80k}{1}{0}}
        spam = nobody:true
  warn  message = X-Spam-Report: $spam_report
        condition = ${if <{$message_size}{80k}{1}{0}}
        spam = nobody:true
  warn  message = X-Redirect-To: spam@???
        condition = ${if <{$message_size}{80k}{1}{0}}
        spam = nobody
  warn message = X-Spam-Flag: YES
        condition = ${if <{$message_size}{80k}{1}{0}}
        log_message = SPAM ($spam_score)
        spam = nobody

Exim unfortunately still pass to spamd messages greater
than 50k. Any ideas why?

Thanks

Riccardo