[Exim] Exiscan, Spamassasin and max size of messages

Hello there,

how can I tell spamassassin NOT to scan
messages exceeding a defined size.

Spamassassin is dying on one of our machines
if message-size is 10 megs or larger ..

Any suggestions ?

Thanks,
Tom

-------------------------------------------------------------------------
Exim v.4.30
Spamassassin 2.61
-------------------------------------------------------------------------

Exim-Conf:

.....
# Exiscan-ACL
acl_check_data:

  # Spamassassin and Exiscan-ACL
  warn    message       = X-Spam-Score: $spam_score
          spam          = nobody:true

  # Warn-Message
  warn    message       = X-Spam-Report: $spam_report
          spam          = nobody:true
          condition     = ${if >{$spam_score_int}{60}{1}{0}}

  # Subject-Change
  warn    message       = X-AntiSpam-Subject: *****SPAM***** $h_Subject
          spam          = nobody

  # Deny Spam higher that 15
  deny    message       = This message scored $spam_score spam points and will not be delivered.
          spam          = nobody:true
          condition     = ${if >{$spam_score_int}{150}{1}{0}}

.....