### acl/40_exim4-config_check_data
#################################

# This ACL is used after the contents of a message have been received. This
# is the ACL in which you can test a message's headers or body, and in
# particular, this is where you can invoke external virus or spam scanners.

acl_check_data:

  # Deny unless the address list headers are syntactically correct.
  #
  # This might reject legitimate mail...
  deny
    message = Message headers fail syntax check
    !verify = header_syntax


  # require that there is a verifiable sender address in at least
  # one of the "Sender:", "Reply-To:", or "From:" header lines.
  deny
    message = No verifiable sender address in message headers
    !verify = header_sender

  # Don't spamcheck big messages
  accept
    condition = ${if >{$message_size}{80k}}
    add_header = X-Spam-Report: Message too big, not scanned.

  # Deny messages with a large spamscore. The threshold is set by
  # spamassassin, see required_score in /etc/spamassassin/local.cf
  deny
    message = Message was classified as spam
    # Check using spamassasin, running as the "spamd" user.
    spam = spamd

  # Accept any other messages, but add spam headers.
  accept
    add_header = X-Spam-Score: $spam_score ($spam_bar)
    add_header = X-Spam-Report: $spam_report

# vim: set sts=2 expandtab sw=2 ai: