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94
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1 # $Id$
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2 #
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3
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4 # Partial bnf description of this configuration language. Any sequence of
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5 # three tokens ("include" FILENAME ";") are replaced by the content of the
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6 # specified file.
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7 #
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8 #
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9 # CONFIG = {CONTEXT ";"}+
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10 # CONTEXT = "context" NAME "{" {STATEMENT}+ "}"
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11 # STATEMENT = (DNSBL | DNSBLLIST | CONTENT | ENV-TO | CONTEXT | ENV-FROM) ";"
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12
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13 # DNSBL = "dnsbl" NAME DNSPREFIX ERROR-MSG
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14
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15 # DNSBLLIST = "dnsbl_list" {NAME}+
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16
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17 # CONTENT = "content" ("on" | "off") "{" {CONTENT-STATEMENT}+ "}"
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18 # CONTENT-STATEMENT = (FILTER | IGNORE | TLD | HTML-TAGS | HTML-LIMIT | HOST-LIMIT) ";"
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19 # FILTER = "filter" DNSPREFIX ERROR-MSG
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20 # IGNORE = "ignore" "{" {HOSTNAME [";"]}+ "}"
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21 # TLD = "tld" "{" {TLD [";"]}+ "}"
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22 # HTML-TAGS = "html_tags" "{" {HTMLTAG [";"]}+ "}"
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23 # ERROR-MSG = string containing exactly two %s replacement tokens for the client ip address
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24
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25 # HTML-LIMIT = "html_limit" ("on" INTEGER ERROR-MSG | "off")
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26
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27 # HOST-LIMIT = "host_limit" ("on" INTEGER ERROR-MSG | "off" | "soft" INTEGER)
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28
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29 # ENV-TO = "env_to" "{" {(TO-ADDR | DCC-TO)}+ "}"
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30 # TO-ADDR = ADDRESS [";"]
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31 # DCC-TO = "dcc_to" ("ok" | "many") "{" DCCINCLUDEFILE "}" ";"
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32
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33 # ENV_FROM = "env_from" [DEFAULT] "{" {(FROM-ADDR | DCC-FROM)}+ "}"
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34 # FROM-ADDR = ADDRESS VALUE [";"]
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35 # DCC-FROM = "dcc_from" "{" DCCINCLUDEFILE "}" ";"
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36 # DEFAULT = ("white" | "black" | "unknown" | "inherit" | "")
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37 # ADDRESS = (USER@ | DOMAIN | USER@DOMAIN)
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38 # VALUE = ("white" | "black" | "unknown" | CHILD-CONTEXT-NAME)
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39
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40
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41 context sample {
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42 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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43 dnsbl sbl sbl-xbl.spamhaus.org "Mail from %s rejected - sbl; see http://www.spamhaus.org/query/bl?ip=%s";
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44 dnsbl xbl xbl.spamhaus.org "Mail from %s rejected - xbl; see http://www.spamhaus.org/query/bl?ip=%s";
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45 dnsbl dul dul.dnsbl.sorbs.net "Mail from %s rejected - dul; see http://www.sorbs.net/lookup.shtml?%s";
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46 dnsbl_list local sbl dul;
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47
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48 content on {
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49 filter sbl-xbl.spamhaus.org "Mail containing %s rejected - sbl; see http://www.spamhaus.org/query/bl?ip=%s";
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50 ignore { include "hosts-ignore.conf"; };
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51 tld { include "tld.conf"; };
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52 html_tags { include "html-tags.conf"; };
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53 html_limit on 20 "Mail containing excessive bad html tags rejected";
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54 html_limit off;
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55 host_limit on 20 "Mail containing excessive host names rejected";
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56 host_limit soft 20;
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57 };
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58
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59 env_to {
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60 mydomain.com; # child contexts are not allowed to specify recipient addresses outside these domains
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61 customer1.com;
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62 customer1a.com;
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63 customer1b.com;
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64 customer2.com;
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65 customer2a.com;
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66 customer2b.com;
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67 };
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68
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69 context whitelist {
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70 content off {};
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71 env_to {
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72 # dcc_to ok { include "/var/dcc/whitecommon"; }; # copy the dcc OK values (env_to) into this context
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73 };
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74 env_from white {}; # white forces all unmatched from addresses (everyone in this case) to be whitelisted
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75 # so all mail TO these env_to addresses is accepted
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76 };
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77
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78 context abuse {
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79 dnsbl_list xbl;
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80 content off {};
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81 env_to {
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82 abuse@; # no content filtering on abuse reports
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83 postmaster@; # ""
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84 };
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85 env_from unknown {}; # ignore all parent white/black listing
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86 };
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87
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88 context minimal {
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89 dnsbl_list sbl dul;
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90 content on {};
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91 env_to {
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92 sales@mydomain.com;
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93 };
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94 };
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95
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96 context blacklist {
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97 env_to {
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98 dcc_to many { include "/var/dcc/whitecommon"; }; # copy the dcc MANY values (env_to) into this context
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99 old-employee@mydomain.com;
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100 };
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101 env_from black {}; # black forces all unmatched from addresses (everyone in this case) to be blacklisted
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102 # so all mail TO these env_to addresses is rejected
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103 };
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104
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105 context vp { # special context for the vp
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106 env_to {
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107 vp@mydomain.com;
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108 };
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109 env_from inherit {
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110 nai.com black; # the vp does not like nai
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111 yahoo.com unknown; # override parent context blacklisting
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112 mother@spammyisp.com white; # suppress dnsbl checking
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113 };
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114 };
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115
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116 context customer1 {
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117 dnsbl_list sbl dul;
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118 env_to {
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119 customer1.com;
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120 customer1a.com;
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121 customer1b.com;
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122 };
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123
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124 verify mail.customer1.com;
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125
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126 context customer1a {
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127 env_to {
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128 customer1a.com;
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129 }
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130 env_from black { # blacklist everything
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131 first@acceptable.com unknown; # except these specific envelope senders
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132 second@another.com unknown;
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133 yahoo.com inherit; # delegate to the parent
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134 };
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135 };
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136
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137 env_from { # default value of the default is inherit
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138 yahoo.com black; # no mail from yahoo
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139 first@yahoo.com unknown; # except this one
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140 };
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141 };
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142
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143 context customer2 {
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144 dnsbl_list sbl;
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145 env_to {
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146 customer2.com;
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147 customer2a.com;
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148 customer2b.com;
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149 };
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150 };
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151
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152 env_from unknown {
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153 dcc_from { include "/var/dcc/whitecommon"; }; # copy the dcc OK/MANY values (env_from, substitute mail_host) into this context
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154 abuse@ abuse; # replies to abuse reports use the abuse context
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155 yahoo.com black; # don't take mail from yahoo
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156 spammer@example.com black;
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157 };
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158 };
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159
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