3 # Copyright (c) 1998-2002, 2005-2007 Sendmail, Inc. and its suppliers.
6 # By using this file, you agree to the terms and conditions set
7 # forth in the LICENSE file which can be found at the top level of
8 # the sendmail distribution.
12 ifdef(`DNSBL_MAP', `', `define(`DNSBL_MAP', `dns -R A')')
14 ifdef(`_DNSBL_R_',`dnl',`dnl
15 VERSIONID(`$Id: dnsbl.m4,v 8.33 2007/01/05 18:49:29 ca Exp $')
16 define(`_DNSBL_R_',`')
17 ifelse(defn(`_ARG_'), `',
18 `errprint(`*** ERROR: missing argument for FEATURE(`dnsbl')')')
20 # map for DNS based blacklist lookups
21 Kdnsbl DNSBL_MAP -T<TMP>ifdef(`DNSBL_MAP_OPT',` DNSBL_MAP_OPT')')
23 define(`_DNSBL_SRV_', `_ARG_')dnl
24 define(`_DNSBL_MSG_', `ifelse(len(X`'_ARG2_),`1',`"550 Rejected: " $`'&{client_addr} " listed at '_DNSBL_SRV_`"',`_ARG2_')')dnl
25 define(`_DNSBL_MSG_TMP_', `ifelse(_ARG3_,`t',`"451 Temporary lookup failure of " $`'&{client_addr} " at '_DNSBL_SRV_`"',`_ARG3_')')dnl
27 # DNS based IP address spam list _DNSBL_SRV_
28 R$* $: $&{client_addr}
29 R$-.$-.$-.$- $: <?> $(dnsbl $4.$3.$2.$1._DNSBL_SRV_. $: OK $)
31 ifelse(len(X`'_ARG3_),`1',
32 `R<?>$+<TMP> $: TMPOK',
33 `R<?>$+<TMP> $#error $@ 4.4.3 $: _DNSBL_MSG_TMP_')
34 ifelse(`X'_ARG2_,`Xquarantine',
35 `R<?>$+ $#error $@ quarantine $: _DNSBL_SRV_',
37 `R<?>$+ $#discard $: _DNSBL_SRV_',
38 `R<?>$+ $#error $@ 5.7.1 $: _DNSBL_MSG_')