#
# vim: set filetype=procmail :
#
# $Id: dnsbl_test,v 1.3 2002/12/21 18:28:08 adicvs Exp $
#
# This file is called by dnsbl. It will test the untrusted ip by looking
# up the ip address in the DNSBL_NS nameserver. It will add a header line
# if the untrusted ip is an open relay.
#

# Check against DNSBL_NS
# Use sed to properly display multiline output from nslookup by
# indenting all ines with tab except for the first line
DNSBL_CHECK="xx"
DNSBL_CHECK=`${NSLOOKUP} ${IP_REV}.${DNSBL_NS} | ${SED} '2,$s/^/	/'`

# Process the nslookup output for debugging purposes
:0
* DNSBL_DEBUG ?? yes
{
    # Log
    :0
    * DNSBL_LOG ?? yes
    {
	LOG=" debug: ${DNSBL_CHECK}.${NL}"
    }

    # Insert header
    :0 fhw
    | formail -A "X-Spam-Debug: ${DNSBL_CHECK}"
}

# Is this ip a known spammer or open relay?
:0
* DNSBL_CHECK ?? 127\.0\.0\.[1-9]
{
    # Log
    :0
    * DNSBL_LOG ?? yes
    {
	LOG=" match: ${DNSBL_NS} lists ${IP_STR}.${NL}"
    }

    # Insert header
    :0 fhw
    | formail -A "X-Spamcheck: ${DNSBL_NS} lists ${IP_STR} - see ${DNSBL_URI}"
}

# end