annotate dnsbl.conf @ 268:f941563c2a95 stable-6-0-34

Add require_rdns checking
author Carl Byington <carl@five-ten-sg.com>
date Wed, 22 May 2013 11:29:44 -0700
parents e118fd2c6af0
children f92f24950bd3
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1 context main-default {
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2 // outbound dnsbl filtering to catch our own customers that end up on the sbl
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3 dnsbl sbl sbl-xbl.spamhaus.org "Mail from %s rejected - sbl; see http://www.spamhaus.org/query/bl?ip=%s";
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4 dnsbl_list sbl;
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5
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6 // outbound content filtering to prevent our own customers from sending spam
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7 content on {
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8 filter sbl-xbl.spamhaus.org "Mail containing %s rejected - sbl; see http://www.spamhaus.org/query/bl?ip=%s";
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9 uribl multi.surbl.org "Mail containing %s rejected - surbl; see http://www.rulesemporium.com/cgi-bin/uribl.cgi?bl0=1&domain0=%s";
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10 #uribl multi.uribl.com "Mail containing %s rejected - uribl; see http://l.uribl.com/?d=%s";
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11 ignore { include "hosts-ignore.conf"; };
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12 tld { include "tld.conf"; };
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13 cctld { include "cctld.conf"; };
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14 html_tags { include "html-tags.conf"; };
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15 html_limit on 20 "Mail containing excessive bad html tags rejected";
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16 html_limit off;
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17 host_limit on 20 "Mail containing excessive host names rejected";
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18 host_limit soft 20;
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19 spamassassin 4;
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20 require_match yes;
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21 dcc_greylist yes;
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22 dcc_bulk_threshold 50;
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23 };
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24
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25 // backscatter prevention - don't send bounces for mail that we accepted but could not forward
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26 // we only send bounces to our own customers
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27 env_from unknown {
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28 "<>" black;
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29 };
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30
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31 // hourly recipient rate limit by smtp auth client id,
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32 // or unauthenticated mail from address
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33 // default hourly limit is 30
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34 // daily limits are 4 times the hourly limit
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35 rate_limit 30 4 { // default
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36 #fred 100; // override default limits
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37 #joe 10; // ""
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38 #"sam@somedomain.tld" 500;
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39 #"@otherdomain.tld" 100;
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40 };
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41 };
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42
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43 context main {
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44 dnsbl localp partial.blackholes.five-ten-sg.com "Mail from %s rejected - local; see http://www.five-ten-sg.com/blackhole.php?%s";
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45 dnsbl local blackholes.five-ten-sg.com "Mail from %s rejected - local; see http://www.five-ten-sg.com/blackhole.php?%s";
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46 dnsbl sbl zen.spamhaus.org "Mail from %s rejected - sbl; see http://www.spamhaus.org/query/bl?ip=%s";
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47 dnsbl xbl xbl.spamhaus.org "Mail from %s rejected - xbl; see http://www.spamhaus.org/query/bl?ip=%s";
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48 dnswl dnswl.org list.dnswl.org 2;
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49 dnsbl_list local sbl;
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50 dnswl_list dnswl.org;
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51 require_rdns yes;
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52
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53 content on {
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54 filter sbl-xbl.spamhaus.org "Mail containing %s rejected - sbl; see http://www.spamhaus.org/query/bl?ip=%s";
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55 uribl multi.surbl.org "Mail containing %s rejected - surbl; see http://www.rulesemporium.com/cgi-bin/uribl.cgi?bl0=1&domain0=%s";
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56 #uribl multi.uribl.com "Mail containing %s rejected - uribl; see http://l.uribl.com/?d=%s";
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57 ignore { include "hosts-ignore.conf"; };
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58 tld { include "tld.conf"; };
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59 cctld { include "cctld.conf"; };
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60 html_tags { include "html-tags.conf"; };
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61 html_limit off;
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62 host_limit soft 20;
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63 spamassassin 5;
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64 require_match yes;
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65 dcc_greylist yes;
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66 dcc_bulk_threshold 20;
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67 };
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68
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69 generic "^dsl.static.*ttnet.net.tr$|(^|[x.-])(ppp|h|host)?([0-9]{1,3}[x.-](Red-|dynamic[x.-])?){4}"
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70 "your mail server %s seems to have a generic name";
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71
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72 white_regex "=example.com=user@yourhostingaccount.com$";
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73
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74 env_to {
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75 # !! replace this with your domain names
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76 # child contexts are not allowed to specify recipient addresses outside these domains
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77 # if this is a backup-mx, you need to include here domains for which you relay to the primary mx
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78 include "/etc/mail/local-host-names";
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79 };
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80
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81 context whitelist {
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82 content off {};
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83 env_to {
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84 # dcc_to ok { include "/var/dcc/whitecommon"; };
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85 };
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86 env_from white {}; # white forces all unmatched from addresses (everyone in this case) to be whitelisted
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87 # so all mail TO these env_to addresses is accepted
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88 };
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89
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90 context abuse {
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91 dnsbl_list xbl;
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92 content off {};
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93 generic "^$ " " "; # regex cannot match, to disable generic rdns rejects
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94 env_to {
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95 abuse@ # no content filtering on abuse reports
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96 postmaster@ # ""
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97 };
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98 env_from unknown {}; # ignore all parent white/black listing
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99 };
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100
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101 context minimal {
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102 dnsbl_list sbl;
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103 content on {
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104 spamassassin 10;
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105 dcc_bulk_threshold many;
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106 };
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107 generic "^$ " " "; # regex cannot match, to disable generic rdns rejects
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108 env_to {
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109 };
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110 };
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111
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112 context blacklist {
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113 dnsbl_list ;
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114 dnswl_list ;
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115 env_to {
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116 # dcc_to many { include "/var/dcc/whitecommon"; };
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117 };
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118 env_from black {}; # black forces all unmatched from addresses (everyone in this case) to be blacklisted
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119 # so all mail TO these env_to addresses is rejected
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120 };
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121
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122 env_from unknown {
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123 abuse@ abuse; # replies to abuse reports use the abuse context
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124 # dcc_from { include "/var/dcc/whitecommon"; };
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125 };
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126
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127 autowhite 90 "autowhite/my-auto-whitelist";
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128 # install should create /etc/dnsbl/autowhite writable by userid dnsbl
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129 };
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130