Antispam Sendmail config

sendmail.cf

####
## The Anti-Spam and general blocking stuff
####

## The NDBM file used for the blocking rulesets
KSpam dbm -o /usr/local/mail/maps/AntiSpam

## Web page for info on the rulesets
D{WebPage}" - see http://www.bpfh.net/spam/"

####
## Handle the -bt mode for rules which use $| as a separator. We need
## this as can't put in $| when using -bt.
##
##  % sendmail -bt -d21.12
##  ADDRESS TEST MODE (ruleset 3 NOT automatically invoked)
##  Enter <ruleset> <address>
##  > Start,check_compat <sender> $| <recipient>
##
####
SStart
R$* $$| $*			$: $1 $| $2


#####
###
### The following are the anti-spam and general blocking rules.
### These use a single map (currently an NDBM file) which has hosts,
### domains and IP addresses as its key. The values are the action
### to be performed on the key value. These include things like
### allowing relaying to a domain, if the EMail is from a spammer, etc.
###
#####

#####
###
### First we have the general utility functions used by some or all
### of the actual rulesets
###
#####

####
## Handle the anti-spam messages in one place. This ruleset takes
## the message type (see comp_value) and any args. The args depend
## on the message type.
####
SSpamMsg
RRELAY $| $*			$#error $: " 550 we do not support relaying " $1 " " $(dequote "" $&{client_name} $) " [" $(dequote "" $&{client_addr} $) "] " $&{WebPage} " [RELAY]"
RBLOCKED 			$#error $: " 550 Your site " $(dequote "" $&{client_name} $) " [" $(dequote "" $&{client_addr} $) "] is blocked " $&{WebPage} " [BLOCKED]"
RSPAM_CLIENT 			$#error $: " 550 Your site " $(dequote "" $&{client_name} $) " [" $(dequote "" $&{client_addr} $) "] is blocked - use your ISP provided relay " $&{WebPage} " [SPAM_CLIENT]"
RNOACCEPT			$#error $: " 550 We do not accept mail from you "$(dequote "" $&{client_name} $) " [" $(dequote "" $&{client_addr} $) "] " $&{WebPage} " [NOACCEPT]"
RDIALUP				$#error $: " 550 We do not accept mail from you "$(dequote "" $&{client_name} $) " [" $(dequote "" $&{client_addr} $) "] as you appear to be a dialup host " $&{WebPage} " [DIALUP]"
RSPAMMER $| $*			$#error $: " 550 We do not accept mail from spammers " $1 " " $&{WebPage} " [SPAMMER]"
RKILL_EMAIL $| $*		$#error $: " 550 We do not accept mail from you " $1 " for a reason other than spamming " $&{WebPage} " [KILL_EMAIL]"
RSPAM $| $*			$#error $: " 550 We do not accept mail from " $1 $(dequote "" $&{client_name} $) " [" $(dequote "" $&{client_addr} $) "] " $&{WebPage} " [SPAM]"
RSPECIAL $| $* $| $*			$#error $: " 550 Mail from " $1 " must come from a machine in the " $2 " domain, not from " $(dequote "" $&{client_name} $) " [" $(dequote "" $&{client_addr} $) "] " $&{WebPage} " [SPECIAL]"
RNO_DNS $| $*			$#error $: " 550 We do not accept mail from domains which do not resolve (domain: " $1 ") " $(dequote "" $&{client_name} $) " [" $(dequote "" $&{client_addr} $) "] " $&{WebPage} " [NO_DNS]"
REXT_MAPS			$#error $: 550 " Mail from " $(dequote "" $&{client_addr} $) " refused by MAPS, see http://mail-abuse.org/cgi-bin/lookup?" $&{client_addr} " " $&{WebPage} " [EXT_MAPS]"
REXT_MAPS_DUL			$#error $: 550 " Mail from " $(dequote "" $&{client_addr} $) " refused by MAPS DUL, see http://mail-abuse.org/dul/ " $&{WebPage} " [EXT_MAPS_DUL]"
REXT_RSS			$#error $: 550 " Mail from " $(dequote "" $&{client_addr} $) " refused by RSS, see http://www.mail-abuse.org/cgi-bin/nph-rss?" $&{client_addr} " " $&{WebPage} " [EXT_RSS]"
REXT_ORBS			$#error $: 550 " Mail from " $(dequote "" $&{client_addr} $) " refused by ORBS, see http://www.orbs.org/" " " $&{WebPage} " [EXT_ORBS]"
REXT_IMRSS			$#error $: 550 " Mail from " $(dequote "" $&{client_addr} $) " refused byt IMRSS, see http://www.imrss.org/error.html " $&{WebPage} " [EXT_IMRSS]"
REXT_DSSL			$#error $: 550 " Mail from " $(dequote "" $&{client_addr} $) " refused by IMRSS DSSL, see http://www.imrss.org/dssl/unblock.html " $&{WebPage} " [EXT_DSSL]"
REXT_SPEWS			$#error $: 550 " Mail from " $(dequote "" $&{client_addr} $) " refused by SPEWS, see http://www.spews.org/" " " $&{WebPage} " [EXT_SPEWS]"
REXT_SPAMSITES			$#error $: 550 " Mail from " $(dequote "" $&{client_addr} $) " refused by SpamSites, see http://www.spamsites.org/" " " $&{WebPage} " [EXT_SPAMSITES]"
REXT_RSL			$#error $: 550 " Mail from " $(dequote "" $&{client_addr} $) " refused by RSL, see http://relays.visi.com/" " " $&{WebPage} " [EXT_RSL]"
REXT_SBL			$#error $: 550 " Mail from " $(dequote "" $&{client_addr} $) " refused by SBL, see http://www.spamhaus.org/SBL" " " $&{WebPage} " [EXT_SBL]"
REXT_ORDB			$#error $: 550 " Mail from " $(dequote "" $&{client_addr} $) " refused by ORDB, see http://www.ordb.org/" " " $&{WebPage} " [EXT_ORDB]"
REXT_MONKEY_FORM			$#error $: 550 " Mail from " $(dequote "" $&{client_addr} $) " refused by Monkey FormMail, see http://www.monkeys.com/anti-spam/filtering/formmail.html" " " $&{WebPage} " [EXT_MONKEY_FORM]"
REXT_MONKEY_PROXIES			$#error $: 550 " Mail from " $(dequote "" $&{client_addr} $) " refused by Monkey proxie list, see http://www.monkeys.com/anti-spam/filtering/proxies.html" " " $&{WebPage} " [EXT_MONKEY_PROXIES]"
REXT_DSBL_LIST			$#error $: 550 " Mail from " $(dequote "" $&{client_addr} $) " refused by DSBL list, see http://www.dsbl.org/" " " $&{WebPage} " [EXT_DSBL_LIST]"
REXT_DSBL_MULTIHOP			$#error $: 550 " Mail from " $(dequote "" $&{client_addr} $) " refused by DSBL multi-hop list, see http://www.dsbl.org/" " " $&{WebPage} " [EXT_DSBL_MULTIHOP]"
RBADARGS $| $*			$#error $: 554 internal error in the $1 ruleset - contact [email protected] [BADARGS]
R$*				$#error $: 554 internal error in the SpamMsg ruleset was passed $1 - contact [email protected] [INTERNAL ERROR]

####
## Compare values from the Anti-Spam rulesets. Yes, this *is* a
## kludge. If there is an easier way to do (foo == bar) then I'd
## like to hear it.
####
Scomp_value
RBLOCK_IP $| BLOCK_IP		$@ BLOCK_IP
RBLOCK_HOST $| BLOCK_HOST	$@ BLOCK_HOST
RSPAM_CLIENT $| SPAM_CLIENT	$@ SPAM_CLIENT
RSPAM_EMAIL $| SPAM_EMAIL	$@ SPAM_EMAIL
RSPAM_IP $| SPAM_IP		$@ SPAM_IP
RSPAM_HOST $| SPAM_HOST		$@ SPAM_HOST
RRELAY $| RELAY			$@ RELAY
RNO_EXTRN $| NO_EXTRN		$@ NO_EXTRN
RLOCAL_IP $| LOCAL_IP		$@ LOCAL_IP
RLOCAL_HOST $| LOCAL_HOST	$@ LOCAL_HOST
RRELAY_HOST $| RELAY_HOST	$@ RELAY_HOST
RRELAY_IP $| RELAY_IP		$@ RELAY_IP
RALLOW_EMAIL $| ALLOW_EMAIL	$@ ALLOW_EMAIL
RALLOW_HOST $| ALLOW_HOST	$@ ALLOW_HOST
RKILL_EMAIL $| KILL_EMAIL	$@ KILL_EMAIL
R$* $| $*			$@ NO_COMPARE

####
## Handle looking at domains within the AntiSpam map. This takes the
## domain and the required value as domain $| value. This returns
## either NO_COMPARE on failure or one of the results in comp_value
## if a match occurs. This performs a recursive check, ie the name
## foo.bar.com will match if the bar.com domain is in the map.
####
Slookat_domain
R$* . $| $*			$: $1 $| $2
R$*.dialup.$* $| DIALUP		$@ DIALUP
Rdialup.$* $| DIALUP		$@ DIALUP
R$* $| $*			$: $(Spam $1 $:NOMATCH $| $1 $) $| $2
RNOMATCH $| $+ . $* $| $*	$: $>lookat_domain $2 $| $3
R$* $| $*			$@ $>comp_value $1 $| $2

####
## Handle looking at IP addresses within the AntiSpam map. This takes
## the IP and the required value as domain $| value. This returns
## either NO_COMPARE on failure or one of the results in comp_value if
## a match occurs. This performs a recursive check, ie the IP address
## "193.43.45.3" will match if the address "193" is in the map.
####
Slookat_ip
R$* $| $*			$: $(Spam $1 $:NOMATCH $| $1 $) $| $2
RNOMATCH $| $+.$+.$+.$+ $| $*	$: $>lookat_ip $1.$2.$3 $| $5
RNOMATCH $| $+.$+.$+ $| $*	$: $>lookat_ip $1.$2 $| $4
RNOMATCH $| $+.$+ $| $*		$: $>lookat_ip $1 $| $3
R$* $| $*			$@ $>comp_value $1 $| $2

####
## Handle looking at an EMail address. This means taking off trailing
## "."s, surroundding "<" & ">", etc. Returns either NO_COMPARE on
## failure or one of the results of comp_value if a match occurs.
####
Slookat_email
R<$*> $| $*			$: $1 $| $2
R$* . $| $*			$: $1 $| $2
R$* $| $*			$: $(Spam $1 $:NOMATCH $| $1 $) $| $2
RNOMATCH $| $* $| $*		$@ NO_COMPARE
R$* $| $*			$@ $>comp_value $1 $| $2


#####
###
### Now we have the actual rulesets which sendmail calls when doing
### things like:
###
###  o Having a host connection (check_relay)
###  o Getting a MAIL FROM: (check_mail)
###  o Getting an RCPT TO: (check_rcpt)
###  o After a message has been full received (check_compat)
###
### The above are in the order the checking occurs as well.
###
#####

####
## check_compat - this gets both the sender and recipient addresses
## as parameters. However this is called *after* the entire message
## has been recieved so its very much the ruleset of last resort.
##
## We also allow local hosts to send mail with any sender address
## from any recipient address. This is *only* done because I know
## the small number of people who use the local addresses personally
## I know that they will not spam. In situations where this is not
## the case (ie if there is doubt that the end lusers will spam or
## not) then you'll probably want to comment those lines out.
##
## Called as: check_compat <sender> $| <recipient>
## Test with: Start,check_compat <sender> $| <recipient>
##
## It should be noted that this ruleset doesn't deal with something like
##
##  check_compat <spammer%spam.net@mailhost> $| <victim%innocent.com@mailhost>
##
## However the above *is* dealt with by the check_rcpt ruleset correctly. I
## should probably rework this ruleset to also handle this. When I actually
## have free time that is (yeah, *right*. As if that will ever happen)
##
####
Scheck_compat
R$* $| $*			$: <$1> $| <$2>
R<<$*>> $| $*			$: <$1> $| $2
R$* $| <<$*>>			$: $1 $| <$2>
R<$* @ $*> $| $*		$: <$1@$2> $| $3 $| $>lookat_domain $2 $| RELAY
R<> $| <$* @ $*> 		$: <> $| <$1@$2> $| $>lookat_domain $2 $| RELAY
R$* $| <$* @ $*> $| NO_COMPARE	$: $1 $| <$2@$3> $| $>lookat_domain $3 $| RELAY
R$* $| $* $| RELAY 		$@ OK
R$* $| $* $| $*			$: $1 $| $2
R$+ $| $+			$: $2 $| $>3 $1	canonicalize sender
R$+ $| $+			$: $2 $| $>3 $1	canonicalize recipient
R$- $| $+			$@ OK		from here
R$+ $| $-			$@ OK		to here
R$+<@$=w.> $| $+		$@ OK		from here
R$+ $| $*<@$=w.>		$@ OK		to here
R$+<@$*> $| $*<@$*>		$: <$1@$2> $| <$3@$4>
##
## The following three lines enable local addresses to send mail using
## any sender or recipient address they wish to. See the notes above
## for the dangers of this.
##
R$* $| $* 			$: $1 $| $2 $| $&{client_addr}
R$* $| $* $| $*			$: $1 $| $2 $| $>lookat_ip $3 $| LOCAL_IP
R$* $| $* $| LOCAL_IP		$@ OK
R$* $| $* $| $*			$: $1 $| $2 $| $&{client_name}
R$* $| $* $| $*			$: $1 $| $2 $| $>lookat_domain $3 $| LOCAL_HOST
R$* $| $* $| LOCAL_HOST		$@ OK
## 
## If we're here then its a relay attempt - so block it. Without these
## lines the check_compat ruleset is essentially useless.
##
R$* $| $* $| $*			$@ $> SpamMsg RELAY $| $1
R$* $| $*			$@ $> SpamMsg RELAY $| $1

####
## check_relay - this is called when a client connects to the server
## and is given the hostname and IP address of the client separated by a
## $|. Although the name suggests otherwise, this can not be used for
## stopping unauthorized relaying - check_rcpt and check_compat are used
## for that. It can be used for TCP Wrapper-like access controls. Any
## access (ie any bits of (E)SMTP protocol except for QUIT, HELO, EHLO and
## NOOP) will be refused with a "500 Access denied".
##
## Called as: check_relay client_name $| client_addr
####
Scheck_relay
R$* $| $*			$: $1 $| $2 $| $>lookat_domain $1 $| BLOCK_HOST
R$* $| $* $| BLOCK_HOST		$@ $> SpamMsg BLOCKED
R$* $| $* $| $*			$: $1 $| $2 $| $>lookat_ip $2 $| BLOCK_IP
R$* $| $* $| BLOCK_IP		$@ $> SpamMsg BLOCKED
R$*				$@ OK

####
## check_rcpt - called when an RCPT TO: <> is issued by the client. This
## gets the address given by the client. This is used to prevent
## unauthorized relaying by looking at the address and seeing if it is
## local or not. If the address is not and not in the RelayTo map then
## the address is disallowed.
##
## Called as: check_rcpt <recipient>
####
Scheck_rcpt
####
## First things first - see if someone is trying to relay via us
R$+ 				$: $&{client_addr} $| $1
R0 $| $*			$@ OK
## Local IP address ?
R$* $| $*			$: $2 $| $>lookat_ip $1 $| LOCAL_IP
R$* $| LOCAL_IP			$@ OK
R<$*@$*> $| $*			$: $1@$2 $| $3
R$*@$* $| $*			$: <$1@$2> $| $3
## Do we accept this domain ?
R<$*@$*> $| $*			$: <$1@$2> $| $>lookat_domain $2 $| RELAY
R$* $| RELAY			$@ OK
## Hmmmm... not one we're explicitly relaying...
R$* $| $*			$: $>3 $1
# Remove the local part
R$+				$:$>removelocal $1
# If anything non-local is here then its a relay attempt
# ... so we first see if an allowed host or network is doing it
R$*<@$+>$*			$: <$1@$2> $| $>lookat_domain $&{client_name} $| RELAY_HOST
R<$*> $| RELAY_HOST		$@ OK
R<$*> $| $*			$: <$1> $| $>lookat_domain $&{client_name} $| RELAY_IP
R<$*> $| RELAY_IP		$@ OK
# We've got through that so anything non-local is a relay attempt
R<$*> $| $*			$@ $> SpamMsg RELAY $| "to <" $1 ">"
# All is fine - accept the RCPT TO:
# It should be noted that the host and IP address checks do not need to be
# performed - they are done in check_mail
R$*				$@ OK

####
## removelocal - remove any local bits of the address.
## Used by check_rcpt
####
Sremovelocal
R$*<@$=w.>$*			$: $>removelocal $>3 $1 $3
R$*<@$*>$*			$@ $1<@$2>$3
# dequote local part
R$-				$: $>3 $(dequote $1 $)
R$*<@$*>$*			$: $>removelocal $1<@$2>$3


####
## Special case for usa.com.
##  If it comes from usa.com mail servers then it passes
####
SSpecialUsaCom
R$* $| $*.usa.com		$@ OK
R$* $| $*			$@ $> SpamMsg SPECIAL $| $1 $| usa.com

####
## Special case for Yahoo.com.
##  If it comes from yahoo.com mail servers then it passes
####
SSpecialYahoo
R$* $| $*.yahoo.com		$@ OK
R$* $| onion.valueclick.com	$@ OK
R$* $| $*			$@ $> SpamMsg SPECIAL $| $1 $| yahoo.com

####
## Special case for Hotmail.com.
##  If it comes from hotmail.com mail servers then it passes
####
SSpecialHotmail
R$* $| $*.hotmail.com		$@ OK
R$* $| onion.valueclick.com	$@ OK
R$* $| $*.parasolsolutions.com	$@ OK
R$* $| $*			$@ $> SpamMsg SPECIAL $| $1 $| hotmail.com

####
## Special case for aol.com.
##  If it comes from hotmail.com mail servers then it passes
####
SSpecialAol
R$* $| $*.aol.com		$@ OK
R$* $| $*			$@ $> SpamMsg SPECIAL $| $1 $| aol.com

####
## Special case for aol.co.uk.
##  If it comes from AOL mail servers then it passes
####
SSpecialAolUk
R$* $| $*.aol.co.uk		$@ OK
R$* $| $*.aol.com		$@ OK
R$* $| $*			$@ $> SpamMsg SPECIAL $| $1 $| aol.co.uk

####
## Special case for Lycos
##  If it comes from lycos.com mail servers then it passes
####
SSpecialLycos
R$* $| $*.lycos.com		$@ OK
R$* $| $*			$@ $> SpamMsg SPECIAL $| $1 $| lycos.com

####
## check_mail - called when the client issues a MAIL FROM: <> command. This
## calls the external checks like MAPS RBL, ORBS, etc. It also blocks on the
## sender mail address.
##
## Called as: check_mail <sender>
####
Scheck_mail
# First we see if this is a local host - if so its always trusted
R$*				$: $1 $| $>lookat_ip $&{client_addr} $| LOCAL_IP
R$* $| LOCAL_IP			$@ OK
R$* $| $*			$: $1 $| $>lookat_domain $&{client_name} $| LOCAL_HOST
R$* $| LOCAL_HOST		$@ OK
# Now see if is it a short-circuit domain
R$* $| $*			$: $1 $| $>lookat_email $1 $| ALLOW_EMAIL
R$* $| ALLOW_EMAIL		$@ OK
# Now let us see if the sender is a known spammer
R$* $| $*			$: $1 $| $>lookat_email $1 $| SPAM_EMAIL
R$* $| SPAM_EMAIL		$@ $> SpamMsg SPAMMER $| <$1>
# Do we just kill this EMail ?
R$* $| $*			$: $1 $| $>lookat_email $1 $| KILL_EMAIL
R$* $| KILL_EMAIL		$@ $> SpamMsg KILL_EMAIL $| <$1>
R<> $| $*			$: <<NULL>> $| $1
R<$*> $| $*			$: $1 $| $2
####
## Special cases
####
R$*@usa.com $| $*		$@ $> SpecialUsaCom [email protected] $| $&{client_name}
R$*@yahoo.com $| $*		$@ $> SpecialYahoo [email protected] $| $&{client_name}
R$*@hotmail.com $| $*		$@ $> SpecialHotmail [email protected] $| $&{client_name}
R$*@aol.com $| $*		$@ $> SpecialAol [email protected] $| $&{client_name}
R$*@aol.co.uk $| $*		$@ $> SpecialAolUk [email protected] $| $&{client_name}
R$*@lycos.com $| $*		$@ $> SpecialLycos [email protected] $| $&{client_name}
####
## Start to look at the domain
R$*@$* $| $*			$: $2
# Do we allow the domain through ?
R$*				$: $1 $| $>lookat_domain $1 $| ALLOW_HOST
R$* $| ALLOW_HOST		$@ OK
# Is it a known spam domain ?
R$* $| $*			$: $1 $| $>lookat_domain $1 $| SPAM_HOST
R$* $| SPAM_HOST		$@ $> SpamMsg SPAM $| $1
# Does the DNS resolve - if it doesn't reject it. We try to resolve the name
# a couple of times here to deal with slow resolution.
R$* $| $*			$: $1
R$* .				$: $1
R$*				$: $1 $| GOT_DOMAIN
R$* $| GOT_DOMAIN		$: $[ $1 $] $| DNS_FAIL
R$* . $| $*			$: $1 $| DNS_OKAY
R$* $| $*			$: $[ $1 $] $| DNS_FAIL
R$* . $| $*			$: $1 $| DNS_OKAY
R$* $| $*			$: $[ $1 $] $| DNS_FAIL
R$* . $| $*			$: $1 $| DNS_OKAY
R<NULL> $| $*			$: <NULL> $| DNS_OKAY
R$* $| DNS_FAIL		$@ $> SpamMsg NO_DNS $| $1
##
## We now switch from looking at the domain name given in the MAIL TO to
## looking at the name and network address of the client which actually sent
## us the mail.
##
# Check the client name - is it a spam host ?
R$*				$: $&{client_name} $| $>lookat_domain $&{client_name} $| SPAM_HOST
R$* $| SPAM_HOST		$@ $> SpamMsg SPAM $| ""
# Do we block this host ?
R$* $| $*			$: $1 $| $>lookat_domain $1 $| BLOCK_HOST
R$* $| BLOCK_HOST		$@ $> SpamMsg BLOCKED
R$* $| $*			$: $1 $| $>lookat_domain $1 $| SPAM_CLIENT
R$* $| SPAM_CLIENT		$@ $> SpamMsg SPAM_CLIENT
# Do we let this client through ?
R$* $| $*			$: $1 $| $>lookat_domain $1 $| NO_EXTRN
R$* $| NO_EXTRN			$@ OK
# Is it from a Spam network ?
R$*				$: $&{client_addr} $| $>lookat_ip $&{client_addr} $| SPAM_IP
R$* $| SPAM_IP			$@ $> SpamMsg SPAM $| ""
# Do we block this network ?
R$* $| $*			$: $1 $| $>lookat_ip $1 $| BLOCK_IP
R$* $| BLOCK_IP			$@ $> SpamMsg BLOCKED
# This is a local IP address ?
R$* $| $*			$: $1 $| $>lookat_ip $1 $| LOCAL_IP
R$* $| LOCAL_IP			$@ OK
# Do we let this client through ?
R$* $| $*			$: $1 $| $>lookat_ip $1 $| NO_EXTRN
R$* $| NO_EXTRN			$@ OK
###
## Start to use the external checks. See
##   http://www.declude.com/JunkMail/Support/ip4r.htm
## for more.
###
##
## Use SPEWS - http://www.spews.org/
##
#R$*				$: $&{client_addr}
#R$-.$-.$-.$-			$: $(host $4.$3.$2.$1.spews.relays.osirusoft.com. $: OK $)
#R$+.				$@ $> SpamMsg EXT_SPEWS
##
## Use SpamSites - http://www.spamsites.org/
##
#R$*				$: $&{client_addr}
#R$-.$-.$-.$-			$: $(host $4.$3.$2.$1.spamsites.relays.osirusoft.com. $: OK $)
#R$+.				$@ $> SpamMsg EXT_SPAMSITES
##
## Use RSL - http://relays.visi.com/
##
R$*				$: $&{client_addr}
R$-.$-.$-.$-			$: $(host $4.$3.$2.$1.relays.visi.com. $: OK $)
R$+.				$@ $> SpamMsg EXT_RSL
##
## Use SBL - http://www.spamhaus.org/SBL
##
R$*				$: $&{client_addr}
R$-.$-.$-.$-			$: $(host $4.$3.$2.$1.sbl.spamhaus.org. $: OK $)
R$+.				$@ $> SpamMsg EXT_SBL
##
## Use ORDB - http://www.ordb.org/
##
R$*				$: $&{client_addr}
R$-.$-.$-.$-			$: $(host $4.$3.$2.$1.relays.ordb.org. $: OK $)
R$+.				$@ $> SpamMsg EXT_ORDB
##
## Use Monkeys.Com form mail list
##  - http://www.monkeys.com/anti-spam/filtering/formmail.html
##
#R$*				$: $&{client_addr}
#R$-.$-.$-.$-			$: $(host $4.$3.$2.$1.formmail.relays.monkeys.com. $: OK $)
#R$+.				$@ $> SpamMsg EXT_MONKEY_FORM
##
## Use Monkeys.Com open proxie list
##  - http://www.monkeys.com/anti-spam/filtering/proxies.html
##
#R$*				$: $&{client_addr}
#R$-.$-.$-.$-			$: $(host $4.$3.$2.$1.proxies.relays.monkeys.com. $: OK $)
#R$+.				$@ $> SpamMsg EXT_MONKEY_PROXIES
##
## Use DSBL main list - http://www.dsbl.org/
##
R$*				$: $&{client_addr}
R$-.$-.$-.$-			$: $(host $4.$3.$2.$1.list.dsbl.org. $: OK $)
R$+.				$@ $> SpamMsg EXT_DSBL_LIST
##
## Use DSBL multi-hop list - http://www.dsbl.org/
##  DISABLED
##
#R$*				$: $&{client_addr}
#R$-.$-.$-.$-			$: $(host $4.$3.$2.$1.multihop.dsbl.org. $: OK $)
#R$+.				$@ $> SpamMsg EXT_DSBL_MULTIHOP
##
## Use the MAPS list - http://mail-abuse.org/rbl/
##  DISABLED
##
#R$*				$: $&{client_addr}
#R$-.$-.$-.$-			$: $(host $4.$3.$2.$1.blackholes.mail-abuse.org. $: OK $)
#R$+.				$@ $> SpamMsg EXT_MAPS 
##
## Use the MAPS DUL list - http://mail-abuse.org/dul/
##  DISABLED
##
#R$*				$: $&{client_addr}
#R$-.$-.$-.$-			$: $(host $4.$3.$2.$1.dialups.mail-abuse.org. $: OK $)
#R$+.				$@ $> SpamMsg EXT_MAPS_DUL
##
## Use the RSS - http://www.mail-abuse.org/rss/
##  DISABLED
##
#R$*				$: $&{client_addr}
#R$-.$-.$-.$-			$: $(host $4.$3.$2.$1.relays.mail-abuse.org $: OK $)
#R$+.				$@ $> SpamMsg EXT_RSS
##
## Use ORBS - http://www.orbs.org/
##   DISABLED
##
#R$*				$: $&{client_addr}
#R$-.$-.$-.$-			$: $(host $4.$3.$2.$1.relays.orbs.org $: OK $)
#R$+.				$@ $> SpamMsg EXT_ORBS
##
## Use the IMRSS open relay list - http://www.imrss.org/
##   DISABLED
##
#R$*				$: $&{client_addr}
#R$-.$-.$-.$-			$: $(host $4.$3.$2.$1.mr-out.imrss.org. $: OK $)
#R$+.				$@ $> SpamMsg EXT_IMRSS
##
## Use the DSSL dynamic IP list - http://www.imrss.org/dssl
##   DISABLED
##
#R$*				$: $&{client_addr}
#R$-.$-.$-.$-			$: $(host $4.$3.$2.$1.dssl.imrss.org. $: OK $)
#R$+.				$@ $> SpamMsg EXT_DSSL
##
## All is still well, so continue
##
R$*				$@ OK