annotate dnsbl.conf @ 476:fcf66a7aead5 stable-6-0-78

fix dkim regex
author Carl Byington <carl@five-ten-sg.com>
date Sat, 20 Feb 2021 10:24:12 -0800
parents f3f1ece619ba
children
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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.surbl.org/surbl-analysis?d=%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 #uribl dbl.spamhaus.org "Mail containing %s rejected - dbl; see http://www.spamhaus.org/query/domain?domain=%s";
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12 ignore { include "hosts-ignore.conf"; };
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13 tld { include "tld.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 - do not 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, or unauthenticated mail from address
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32 // hourly unique ip addresses by smtp auth client id, or unauthenticated mail from address
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33 // default hourly rate limit is 30
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34 // daily rate limits are 4 times the hourly limit
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35 // default hourly unique ip addresses is 5
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36 // daily unique ip addresses are 4 times the hourly limit
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37 rate_limit 30 4 5 4 { // default
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38 fred 100 10; // override default limits
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39 joe 10 2; // ""
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40 "sam@somedomain.tld" 500 2;
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41 "@otherdomain.tld" 100 2;
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42 };
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43 };
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44
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45 context main {
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46 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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47 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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48 dnsbl sbl zen.spamhaus.org "Mail from %s rejected - sbl; see http://www.spamhaus.org/query/bl?ip=%s";
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49 dnsbl xbl xbl.spamhaus.org "Mail from %s rejected - xbl; see http://www.spamhaus.org/query/bl?ip=%s";
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50 dnswl dnswl.org list.dnswl.org 2;
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51 dnsbl_list local sbl;
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52 dnswl_list dnswl.org;
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53 require_rdns yes;
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54
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55 content on {
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56 dkim_signer {
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57 // we could add consumer facing domains like yahoo.com, aol.com, etc
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58 // here, IF you really want to accept all the mail from such folks.
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59 five-ten-sg.com white;
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60 some.spammer black; // reject if signed by them
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61 };
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62
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63 dkim_from {
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64 // cannot really add consumer facing domains like yahoo.com, aol.com, etc
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65 // here, since such messages from humans might be sent via mailing lists
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66 // that will break the dkim signature. But this works well for commonly
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67 // forged bulk senders like ebay and paypal.
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68 include "dnsbl.dkim.conf";
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69 example.com require_signed "example.com,example.net;ip4:10.0.0.0/16"
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70 };
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71 filter sbl-xbl.spamhaus.org "Mail containing %s rejected - sbl; see http://www.spamhaus.org/query/bl?ip=%s";
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72 uribl multi.surbl.org "Mail containing %s rejected - surbl; see http://www.surbl.org/surbl-analysis?d=%s";
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73 #uribl multi.uribl.com "Mail containing %s rejected - uribl; see http://l.uribl.com/?d=%s";
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74 #uribl dbl.spamhaus.org "Mail containing %s rejected - dbl; see http://www.spamhaus.org/query/domain?domain=%s";
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75 ignore { include "hosts-ignore.conf"; };
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76 tld { include "tld.conf"; };
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77 html_tags { include "html-tags.conf"; };
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78 html_limit off;
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79 host_limit soft 20;
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80 spamassassin 5;
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81 require_match yes;
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82 dcc_greylist yes;
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83 dcc_bulk_threshold 20;
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84 };
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85
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86 generic "^li.*members.linode.com$|^dsl.static.*ttnet.net.tr$|(^|[x.-])(ppp|h|host)?([0-9]{1,3}[x.-](Red-|dynamic[x.-])?){4}"
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87 "your mail server %s seems to have a generic name";
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88
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89 white_regex "=example.com=user@yourhostingaccount.com$";
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90
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91 env_to {
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92 # !! replace this with your domain names
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93 # child contexts are not allowed to specify recipient addresses outside these domains
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94 # if this is a backup-mx, you need to include here domains for which you relay to the primary mx
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95 include "/etc/mail/local-host-names";
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96 };
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97
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98 context whitelist {
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99 content off {};
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100 env_to {
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101 # dcc_to ok { include "/var/dcc/whitecommon"; };
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102 };
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103 env_from white {}; # white forces all unmatched from addresses (everyone in this case) to be whitelisted
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104 # so all mail TO these env_to addresses is accepted
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105 };
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106
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107 context abuse {
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108 dnsbl_list xbl;
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109 content off {};
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110 generic "^$ " " "; # regex cannot match, to disable generic rdns rejects
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111 env_to {
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112 abuse@ # no content filtering on abuse reports
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113 postmaster@ # ""
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114 };
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115 env_from unknown {}; # ignore all parent white/black listing
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116 };
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117
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118 context minimal {
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119 dnsbl_list sbl;
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120 content on {
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121 spamassassin 10;
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122 dcc_bulk_threshold many;
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123 };
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124 generic "^$ " " "; # regex cannot match, to disable generic rdns rejects
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125 env_to {
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126 };
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127 };
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128
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129 context blacklist {
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130 dnsbl_list ;
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131 dnswl_list ;
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132 env_to {
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133 # dcc_to many { include "/var/dcc/whitecommon"; };
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134 };
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135 env_from black {}; # black forces all unmatched from addresses (everyone in this case) to be blacklisted
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136 # so all mail TO these env_to addresses is rejected
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137 };
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138
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139 env_from unknown {
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140 abuse@ abuse; # replies to abuse reports use the abuse context
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141 # dcc_from { include "/var/dcc/whitecommon"; };
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142 };
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143
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144 autowhite 90 "autowhite/my-auto-whitelist";
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145 # install should create /etc/dnsbl/autowhite writable by userid dnsbl
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146 };
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147