Mercurial > hg > nginx-site
annotate xml/en/docs/mail/ngx_mail_core_module.xml @ 1502:b628e042a15e
Documented "listen backlog=" in mail and stream.
author | Ruslan Ermilov <ru@nginx.com> |
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date | Tue, 09 Jun 2015 14:40:14 +0300 |
parents | 9f9b8543b946 |
children | 3ae5301ea37a |
rev | line source |
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1 <?xml version="1.0"?> |
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2 |
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3 <!-- |
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4 Copyright (C) 2006, 2007 Anton Yuzhaninov |
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5 Copyright (C) Nginx, Inc. |
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6 --> |
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7 |
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8 <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd"> |
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9 |
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10 <module name="Module ngx_mail_core_module" |
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11 link="/en/docs/mail/ngx_mail_core_module.html" |
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12 lang="en" |
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13 rev="7"> |
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14 |
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15 <section id="summary"> |
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16 |
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17 <para> |
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18 This module is not built by default, it should be |
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19 enabled with |
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20 the <literal>--with-mail</literal> configuration parameter. |
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21 </para> |
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22 |
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23 </section> |
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24 |
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25 |
1154 | 26 <section id="example" name="Example Configuration"> |
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27 |
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28 <para> |
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29 <example> |
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30 worker_processes 1; |
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31 |
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32 error_log /var/log/nginx/error.log info; |
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33 |
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34 mail { |
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35 server_name mail.example.com; |
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36 auth_http localhost:9000/cgi-bin/nginxauth.cgi; |
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37 |
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38 imap_capabilities IMAP4rev1 UIDPLUS IDLE LITERAL+ QUOTA; |
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39 |
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40 pop3_auth plain apop cram-md5; |
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41 pop3_capabilities LAST TOP USER PIPELINING UIDL; |
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42 |
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43 smtp_auth login plain cram-md5; |
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44 smtp_capabilities "SIZE 10485760" ENHANCEDSTATUSCODES 8BITMIME DSN; |
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45 xclient off; |
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46 |
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47 server { |
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48 listen 25; |
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49 protocol smtp; |
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50 } |
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51 server { |
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52 listen 110; |
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53 protocol pop3; |
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54 proxy_pass_error_message on; |
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55 } |
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56 server { |
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57 listen 143; |
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58 protocol imap; |
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59 } |
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60 server { |
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61 listen 587; |
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62 protocol smtp; |
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63 } |
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64 } |
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65 </example> |
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66 </para> |
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67 |
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68 </section> |
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69 |
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70 |
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71 <section id="directives" name="Directives"> |
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72 |
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73 <directive name="listen"> |
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74 <syntax> |
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75 <value>address</value>:<value>port</value> |
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76 [<literal>ssl</literal>] |
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77 [<literal>backlog</literal>=<value>number</value>] |
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78 [<literal>bind</literal>] |
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79 [<literal>ipv6only</literal>=<literal>on</literal>|<literal>off</literal>] |
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80 [<literal>so_keepalive</literal>=<literal>on</literal>|<literal>off</literal>|[<value>keepidle</value>]:[<value>keepintvl</value>]:[<value>keepcnt</value>]]</syntax> |
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81 <default/> |
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82 <context>server</context> |
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83 |
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84 <para> |
966 | 85 Sets the <value>address</value> and <value>port</value> for the socket |
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86 on which the server will accept requests. |
966 | 87 It is possible to specify just the port. |
88 The address can also be a hostname, for example: | |
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89 <example> |
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90 listen 127.0.0.1:110; |
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91 listen *:110; |
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92 listen 110; # same as *:110 |
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93 listen localhost:110; |
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94 </example> |
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95 IPv6 addresses (0.7.58) are specified in square brackets: |
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96 <example> |
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97 listen [::1]:110; |
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98 listen [::]:110; |
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99 </example> |
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100 UNIX-domain sockets (1.3.5) are specified with the “<literal>unix:</literal>” |
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101 prefix: |
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102 <example> |
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103 listen unix:/var/run/nginx.sock; |
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104 </example> |
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105 |
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106 </para> |
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107 |
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108 <para> |
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109 Different servers must listen on different |
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110 <value>address</value>:<value>port</value> pairs. |
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111 </para> |
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112 |
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113 <para> |
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114 The <literal>ssl</literal> parameter allows specifying that all |
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115 connections accepted on this port should work in SSL mode. |
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116 </para> |
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117 |
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118 <para> |
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119 The <literal>listen</literal> directive |
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120 can have several additional parameters specific to socket-related system calls. |
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121 <list type="tag"> |
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122 |
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123 <tag-name> |
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124 <literal>backlog</literal>=<value>number</value> |
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125 </tag-name> |
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126 <tag-desc> |
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127 sets the <literal>backlog</literal> parameter in the |
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128 <c-func>listen</c-func> call that limits |
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129 the maximum length for the queue of pending connections (1.9.2). |
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130 By default, |
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131 <literal>backlog</literal> is set to -1 on FreeBSD, DragonFly BSD, and Mac OS X, |
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132 and to 511 on other platforms. |
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133 </tag-desc> |
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134 |
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135 <tag-name> |
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136 <literal>bind</literal> |
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137 </tag-name> |
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138 <tag-desc> |
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139 this parameter instructs to make a separate <c-func>bind</c-func> |
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140 call for a given address:port pair. |
966 | 141 The fact is that if there are several <literal>listen</literal> directives with |
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142 the same port but different addresses, and one of the |
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143 <literal>listen</literal> directives listens on all addresses |
966 | 144 for the given port (<literal>*:</literal><value>port</value>), nginx will |
145 <c-func>bind</c-func> only to <literal>*:</literal><value>port</value>. | |
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146 It should be noted that the <c-func>getsockname</c-func> system call will be |
966 | 147 made in this case to determine the address that accepted the connection. |
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148 If the <literal>ipv6only</literal> |
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149 or <literal>so_keepalive</literal> parameters |
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150 are used then for a given |
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151 <value>address</value>:<value>port</value> pair |
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152 a separate <c-func>bind</c-func> call will always be made. |
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153 </tag-desc> |
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154 |
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155 <tag-name> |
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156 <literal>ipv6only</literal>=<literal>on</literal>|<literal>off</literal> |
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157 </tag-name> |
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158 <tag-desc> |
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159 this parameter determines |
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160 (via the <c-def>IPV6_V6ONLY</c-def> socket option) |
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161 whether an IPv6 socket listening on a wildcard address <literal>[::]</literal> |
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162 will accept only IPv6 connections or both IPv6 and IPv4 connections. |
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163 This parameter is turned on by default. |
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164 It can only be set once on start. |
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165 </tag-desc> |
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166 |
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167 <tag-name> |
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168 <literal>so_keepalive</literal>=<literal>on</literal>|<literal>off</literal>|[<value>keepidle</value>]:[<value>keepintvl</value>]:[<value>keepcnt</value>] |
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169 </tag-name> |
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170 <tag-desc> |
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171 this parameter configures the “TCP keepalive” behavior |
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172 for the listening socket. |
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173 If this parameter is omitted then the operating system’s settings will be |
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174 in effect for the socket. |
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175 If it is set to the value “<literal>on</literal>”, the |
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176 <c-def>SO_KEEPALIVE</c-def> option is turned on for the socket. |
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177 If it is set to the value “<literal>off</literal>”, the |
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178 <c-def>SO_KEEPALIVE</c-def> option is turned off for the socket. |
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179 Some operating systems support setting of TCP keepalive parameters on |
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180 a per-socket basis using the <c-def>TCP_KEEPIDLE</c-def>, |
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181 <c-def>TCP_KEEPINTVL</c-def>, and <c-def>TCP_KEEPCNT</c-def> socket options. |
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182 On such systems (currently, Linux 2.4+, NetBSD 5+, and |
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183 FreeBSD 9.0-STABLE), they can be configured |
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184 using the <value>keepidle</value>, <value>keepintvl</value>, and |
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185 <value>keepcnt</value> parameters. |
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186 One or two parameters may be omitted, in which case the system default setting |
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187 for the corresponding socket option will be in effect. |
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188 For example, |
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189 <example>so_keepalive=30m::10</example> |
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190 will set the idle timeout (<c-def>TCP_KEEPIDLE</c-def>) to 30 minutes, |
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191 leave the probe interval (<c-def>TCP_KEEPINTVL</c-def>) at its system default, |
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192 and set the probes count (<c-def>TCP_KEEPCNT</c-def>) to 10 probes. |
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193 </tag-desc> |
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194 |
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195 </list> |
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196 </para> |
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197 |
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198 </directive> |
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199 |
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200 |
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201 <directive name="mail"> |
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202 <syntax block="yes"/> |
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203 <default/> |
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204 <context>main</context> |
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205 |
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206 <para> |
966 | 207 Provides the configuration file context in which the mail server directives |
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208 are specified. |
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209 </para> |
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210 |
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211 </directive> |
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212 |
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213 |
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214 <directive name="protocol"> |
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215 <syntax> |
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216 <literal>imap</literal> | |
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217 <literal>pop3</literal> | |
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218 <literal>smtp</literal></syntax> |
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219 <default/> |
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220 <context>server</context> |
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221 |
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222 <para> |
966 | 223 Sets the protocol for a proxied server. |
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224 Supported protocols are |
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225 <link doc="ngx_mail_imap_module.xml">IMAP</link>, |
966 | 226 <link doc="ngx_mail_pop3_module.xml">POP3</link>, and |
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227 <link doc="ngx_mail_smtp_module.xml">SMTP</link>. |
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228 </para> |
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229 |
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230 <para> |
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231 If the directive is not set, the protocol can be detected automatically |
966 | 232 based on the well-known port specified in the <link id="listen"/> |
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233 directive: |
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234 <list type="bullet"> |
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235 |
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236 <listitem> |
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237 <literal>imap</literal>: 143, 993 |
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238 </listitem> |
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239 |
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240 <listitem> |
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241 <literal>pop3</literal>: 110, 995 |
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242 </listitem> |
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243 |
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244 <listitem> |
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245 <literal>smtp</literal>: 25, 587, 465 |
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246 </listitem> |
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247 |
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248 </list> |
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249 </para> |
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250 |
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251 <para> |
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252 Unnecessary protocols can be disabled using the |
924 | 253 <link doc="../configure.xml">configuration</link> |
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254 parameters <literal>--without-mail_imap_module</literal>, |
1046 | 255 <literal>--without-mail_pop3_module</literal>, and |
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256 <literal>--without-mail_smtp_module</literal>. |
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257 </para> |
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258 |
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259 </directive> |
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260 |
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261 |
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262 <directive name="resolver"> |
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263 <syntax> |
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264 <value>address</value> ... |
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265 [<literal>valid</literal>=<value>time</value>]</syntax> |
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266 <syntax><literal>off</literal></syntax> |
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267 <default>off</default> |
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268 <context>mail</context> |
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269 <context>server</context> |
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270 |
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271 <para> |
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272 Configures name servers used to find the client’s hostname |
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273 to pass it to the |
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274 <link doc="ngx_mail_auth_http_module.xml">authentication server</link>, |
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275 and in the |
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276 <link doc="ngx_mail_proxy_module.xml" id="xclient">XCLIENT</link> |
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277 command when proxying SMTP. |
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278 For example: |
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279 <example> |
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280 resolver 127.0.0.1 [::1]:5353; |
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281 </example> |
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282 An address can be specified as a domain name or IP address, |
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283 and an optional port (1.3.1, 1.2.2). |
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284 If port is not specified, the port 53 is used. |
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285 Name servers are queried in a round-robin fashion. |
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286 <note> |
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287 Before version 1.1.7, only a single name server could be configured. |
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288 Specifying name servers using IPv6 addresses is supported |
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289 starting from versions 1.3.1 and 1.2.2. |
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290 </note> |
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291 By default, nginx caches answers using the TTL value of a response. |
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292 An optional <literal>valid</literal> parameter allows overriding it: |
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293 <example> |
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294 resolver 127.0.0.1 [::1]:5353 valid=30s; |
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295 </example> |
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296 <note> |
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297 Before version 1.1.9, tuning of caching time was not possible, |
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298 and nginx always cached answers for the duration of 5 minutes. |
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299 </note> |
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300 </para> |
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301 |
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302 <para> |
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303 The special value <literal>off</literal> disables resolving. |
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304 </para> |
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305 |
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306 </directive> |
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307 |
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308 |
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309 <directive name="resolver_timeout"> |
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310 <syntax><value>time</value></syntax> |
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311 <default>30s</default> |
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312 <context>mail</context> |
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313 <context>server</context> |
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314 |
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315 <para> |
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316 Sets a timeout for DNS operations, for example: |
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317 <example> |
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318 resolver_timeout 5s; |
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319 </example> |
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320 </para> |
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321 |
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322 </directive> |
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323 |
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324 |
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325 <directive name="server"> |
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326 <syntax block="yes"/> |
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327 <default/> |
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328 <context>mail</context> |
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329 |
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330 <para> |
966 | 331 Sets the configuration for a server. |
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332 </para> |
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333 |
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334 </directive> |
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335 |
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336 |
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337 <directive name="server_name"> |
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338 <syntax><value>name</value></syntax> |
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339 <default>hostname</default> |
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340 <context>mail</context> |
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341 <context>server</context> |
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342 |
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343 <para> |
966 | 344 Sets the server name that is used: |
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345 <list type="bullet"> |
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346 |
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347 <listitem> |
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348 in the initial POP3/SMTP server greeting; |
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349 </listitem> |
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350 |
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351 <listitem> |
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352 in the salt during the SASL CRAM-MD5 authentication; |
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353 </listitem> |
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354 |
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355 <listitem> |
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356 in the <literal>EHLO</literal> command when connecting to the SMTP backend, |
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Updated and simplified the "xclient" directive description.
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357 if the passing of the |
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358 <link doc="ngx_mail_proxy_module.xml" id="xclient">XCLIENT</link> command |
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359 is enabled. |
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360 </listitem> |
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361 |
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362 </list> |
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363 </para> |
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364 |
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365 <para> |
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366 If the directive is not specified, the machine’s hostname is used. |
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367 </para> |
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368 |
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369 </directive> |
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370 |
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371 |
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372 <directive name="timeout"> |
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373 <syntax><value>time</value></syntax> |
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374 <default>60s</default> |
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375 <context>mail</context> |
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376 <context>server</context> |
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377 |
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378 <para> |
966 | 379 Sets the timeout that is used before proxying to the backend starts. |
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Vladimir Homutov <vl@nginx.com>
parents:
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380 </para> |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
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381 |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
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|
382 </directive> |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
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changeset
|
383 |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
384 </section> |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
|
385 |
8283b1048b27
Translated mail modules into English.
Vladimir Homutov <vl@nginx.com>
parents:
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changeset
|
386 </module> |