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著名的linux英雄站点的文档打包

<h1><a name="a.7"></a>7.&nbsp; 安装Postfix</h1>
<h2><a name="a.7.1"></a>7.1.&nbsp; 下载</h2>
<p>　　<a href="javascript:if(confirm('http://www.postfix.org/ftp-sites.html  \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address.  \n\nDo you want to open it from the server?'))window.location='http://www.postfix.org/ftp-sites.html'" tppabs="http://www.postfix.org/ftp-sites.html" target="_top">http://www.postfix.org/ftp-sites.html</a></p>
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  <tbody><tr> 
    <td> <p>[root@mail root]# <span class="type">cd /usr/src</span></p>
      <p>[root@mail src]# <span class="type">wget <a href="javascript:if(confirm('http://postfix.energybeam.com/source/official/postfix-2.0.16.tar.gz  \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address.  \n\nDo you want to open it from the server?'))window.location='http://postfix.energybeam.com/source/official/postfix-2.0.16.tar.gz'" tppabs="http://postfix.energybeam.com/source/official/postfix-2.0.16.tar.gz">http://postfix.energybeam.com/source/official/postfix-2.0.16.tar.gz</a> 
    </span> </p></td>
  </tr>
</tbody></table>
<h2><a name="a.7.2"></a>7.2.&nbsp; 编译与安装</h2>
<p>　　如果你的系统上原来有sendmail，先将其停止并将其文件改名：</p>
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  <tbody><tr> 
    <td> <p>[root@mail src]# <span class="type">/etc/init.d/sendmail stop</span></p>
      <p>[root@mail src]# <span class="type">chkconfig --level 0123456 sendmail
          off          <br>
      </span>[root@mail src]# <span class="type">mv /usr/bin/newaliases /usr/bin/newaliases.orig</span></p>
      <p>[root@mail src]# <span class="type">mv /usr/bin/mailq /usr/bin/mailq.orig</span></p>
      <p>[root@mail src]# <span class="type">mv /usr/sbin/sendmail /usr/sbin/sendmail.orig</span></p>
    </td>
  </tr>
</tbody></table>
<p>&nbsp;</p>
<p>　　然后添加两个组：postfix和maildrop和一个用户：postfix</p>
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  <tbody><tr> 
    <td> <p>[root@mail src]# <span class="type">groupadd -g 400 postfix</span></p>
      <p>[root@mail src]# <span class="type">groupadd -g 401 postdrop</span></p>
      <p>[root@mail src]# <span class="type">useradd -u 400 -g 400 -c postfix
           -M -d/no/where -s/no/shell postfix</span></p>
    </td>
  </tr>
</tbody></table>
<p>　　这里的组和用户的ID是系统中未使用的ID。</p>
<p>&nbsp;</p>
<p>　　编译Postfix，并支持mysql和sasl：</p>
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  <tbody><tr> 
    <td> <p>[root@mail src]# <span class="type">tar -xvzf postfix-2.0.16.tar.gz</span></p>
      <p>[root@mail src]# <span class="type">cd postfix-2.0.16</span></p>
      <p>&nbsp;</p>
      <p>[root@mail postfix-2.0.16]# <span class="type">make -f Makefile.init 
        makefiles \</span></p>
      <p>&gt; <span class="type">'CCARGS=-DUSE_SASL_AUTH -DHAS_MYSQL -I/usr/include/mysql
           -I/usr/include/sasl' \</span></p>
      <p>&gt; <span class="type">'AUXLIBS=-L/usr/lib/mysql -L/usr/lib/sasl2
           -lmysqlclient -lsasl2 -lz -lm'</span></p>
      <p>[root@mail postfix-2.0.16]# <span class="type">make install</span></p>
    </td>
  </tr>
</tbody></table>
<p>　　安装时，安装程序会提问一些问题，可以直接按回车采用默认值。</p>
<p>　　这里切记要指定正确的SASL2的INCLUDE和LIB位置。由于现在很多linux发行版上都已经带有了sasl，如果不指定的话，很可能会使用了不同版本的头文件和库，在这种情况下，每次连接SMTP时，smtpd就会发生致命错误“Fatal:
  SASL per-connection server init...”而崩溃。</p>
<p>&nbsp;</p>
<p>　　给postfix用户做一个系统别名，并将超级用户的邮箱转发到一个普通用户。使用/etc/postfix/aliases别名数据库：</p>
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  <tbody><tr> 
    <td><p>[root@mail postfix-2.0.16]# <font color="#ff0000">cd /etc/postfix</font></p>
      <p>[root@mail postfix]# <span class="type">echo 'root: [e-mail]' 
        &gt;&gt; /etc/postfix/aliases</span></p>
    </td>
  </tr>
</tbody></table>
<p>　　生成/etc/postfix/aliases别名数据库：</p>
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  <tbody><tr> 
    <td>[root@mail postfix]# <span class="type">postalias /etc/postfix/aliases</span></td>
  </tr>
</tbody></table>
<p>　　生成/etc/postfix/virtual的DB库：</p>
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  <tbody><tr>
    <td>
      <p>[root@mail postfix]# <span class="type">postmap virtual</span></p></td>
  </tr>
</tbody></table>
<p>　　保留db格式的virtual库是为了系统临时增加转发方便起见。</p>
<h2><a name="a.7.3"></a>7.3.&nbsp; 配置</h2>
<p>　　修改/etc/postfix/master.cf中的关于cyrus的配置，（cyrus的命令行和以前有不兼容的地方，确保你的cyrus的参数如下使用了-r 
  ${sender}参数）：</p>
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  <tbody><tr> 
    <td><p>[root@mail postfix]# <span class="type">vi master.cf</span></p>
    </td>
  </tr>
</tbody></table>
<p>　　将如下两行：</p>
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  <tbody><tr> 
    <td bgcolor="#ffffcc"> cyrus unix - n n - - pipe<br>
      　user=cyrus argv=/cyrus/bin/deliver -e -r ${sender} -m ${extension} ${user}</td>
  </tr>
</tbody></table>
<p>　　修改为：</p>
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  <tbody><tr> 
    <td bgcolor="#ffffcc"> cyrus unix - n n - - pipe<br>
      　user=cyrus argv=/usr/cyrus/bin/deliver -e -r ${sender} -m ${extension} 
      ${user}</td>
  </tr>
</tbody></table>
<p>　　这里要把cyrus的路径修改为你的cyrus实际安装路径（我们下面会将cyrus-imap安装到/usr/cyrus）。 记着user=...这行前面是以空格缩进的（是上一行的续行）。</p>
<p>&nbsp;</p><table width="100%" border="0" bgcolor="#ccffcc">
  <tbody><tr> 
    <td><p>[root@mail postfix]# <span class="type">vi main.cf</span></p>
    </td>
  </tr>
</tbody></table>
<p>&nbsp;</p>
<p>　　修改/etc/postfix/main.cf的配置：</p>
<table border="0" width="100%" bgcolor="#ccffcc">
  <tbody><tr> 
    <td bgcolor="#ffffcc"> 
      <p>myhostname = mail.cngnu.org</p>
      <p>mydomain = cngnu.org</p>
      <p>myorigin = $mydomain</p>
      <p>mydestination = $mydomain,$myhostname</p>
      <p>mynetworks_style = host</p>
      <p>&nbsp; </p>
      <p>alias_maps = hash:/etc/postfix/aliases</p>
      <p>alias_database = hash:/etc/postfix/aliases</p>
      <p>&nbsp;</p>
      <p>home_mailbox = Maildir/</p>
      <p></p>
      <p>&nbsp;</p>
      <p>mailbox_transport = cyrus</p>
      <p>fallback_transport = cyrus</p>
      <p>&nbsp;</p>
      <p>virtual_maps = hash:/etc/postfix/virtual,mysql:/etc/postfix/virtual.mysql</p>
      <p>&nbsp;</p>
      <p>smtpd_sasl_auth_enable = yes</p>
      <p>broken_sasl_auth_clients = yes</p>
      <p>smtpd_sasl_security_options = noanonymous</p>
      <p>&nbsp;</p>
      <p>smtpd_recipient_restrictions = <br>
&nbsp;&nbsp;&nbsp;&nbsp;permit_mynetworks,<br>
&nbsp;&nbsp;&nbsp;&nbsp;permit_sasl_authenticated,<br>
&nbsp;&nbsp;&nbsp;&nbsp;check_recipient_access mysql:/etc/postfix/filter.mysql,<br>
&nbsp;&nbsp;&nbsp;&nbsp;reject_invalid_hostname,<br>
&nbsp;&nbsp;&nbsp;&nbsp;reject_non_fqdn_hostname,<br>
&nbsp;&nbsp;&nbsp;&nbsp;reject_unknown_sender_domain,<br>
&nbsp;&nbsp;&nbsp;&nbsp;reject_non_fqdn_sender,<br>
&nbsp;&nbsp;&nbsp;&nbsp;reject_non_fqdn_recipient,<br>
&nbsp;&nbsp;&nbsp;&nbsp;reject_unknown_recipient_domain,<br>
&nbsp;&nbsp;&nbsp;&nbsp;reject_unauth_pipelining,<br>
&nbsp;&nbsp;&nbsp;&nbsp;reject_unauth_destination,<br>
&nbsp;&nbsp;&nbsp;&nbsp;permit</p>
      <p></p>
      <p></p></td>
  </tr>
</tbody></table>
<p>　　如果希望支持更多的虚拟域，可以在mydestination参数后面加上你所要支持的域即可。</p>
<p>　　通过virtual和virtual.mysql为系统提供了邮箱本地查询表。</p>
<p>　　使用了SASL来进行SMTP发信认证。</p>
<p>　　通过smtpd_recipient_restrictions提供了基本的反垃圾邮件功能。首先允许本地网络（这里是本机）和通过SASL认
证的用户可以使用本服务器发信；然后检查每个用户的全局邮件过滤功能是否打开，如果关闭则不进行后面的反垃圾邮件检查；其后是一些Postfix支持的基
本反垃圾邮件功能。</p>
<p>　　创建/etc/postfix/virtual.mysql，它提供了本地用户和邮件转发功能。FORWARD字段默认是指向用户的存储邮箱名
的（Cyrus-IMAP所管理的邮箱名称），即进行本地投递；如果FORWARD字段是另外一个用户名或者邮件地址，则该邮件被转发到别的用户或其它邮
件地址。对于</p>
<ul>
  <li>非虚拟域邮箱：其存储邮箱与用户名相同</li>
  <li>虚拟域邮箱：为了支持多个域，考虑到不同的域可能拥有相同的用
户名（本地部分），所以使用邮件全称作为用户的登录名（POP/IMAP的登录名和SMTP认证的登录名），但是由于Cyrus-IMAP不直接支持虚拟
域，不能在邮件的本地部分包含“@”，所以实际的存储邮箱名把“@”替换为“~”。</li>
</ul>
<table width="100%" border="0" bgcolor="#ccffcc">
  <tbody><tr> 
    <td><p>[root@mail postfix]# <span class="type">vi virtual.mysql</span></p></td>
  </tr>
</tbody></table>
<p>&nbsp;</p>
<table border="0" width="100%" bgcolor="#ccffcc">
  <tbody><tr> 
    <td bgcolor="#ffffcc"> 
      <p>#</p>
      <p># mysql config file for alias lookups on postfix</p>
      <p>#</p>
      <p>&nbsp;</p>
      <p># the user name and password to log into the mysql server</p>
      <p>hosts = localhost</p>
      <p>user = mail</p>
      <p>password = secret</p>
      <p>&nbsp;</p>
      <p># the database name on the servers</p>
      <p>dbname = mail</p>
      <p>&nbsp;</p>
      <p># the table name</p>
      <p>table = USER</p>
      <p>&nbsp;</p>
      <p>select_field = FORWARD</p>
      <p>where_field = USERNAME</p>
      <p>additional_conditions = and STATUS = 1 limit 1</p>
    </td>
  </tr>
</tbody></table>

<p>&nbsp;</p>
<table width="100%" border="0" bgcolor="#ccffcc">
  <tbody><tr>
    <td><p>[root@mail postfix]# <span class="type">vi filter.mysql</span></p></td>
  </tr>
</tbody></table>
<p>&nbsp;</p>
<table border="0" width="100%" bgcolor="#ccffcc">
  <tbody><tr>
    <td bgcolor="#ffffcc">
      <p>#</p>
      <p># mysql config file for filter flag on postfix</p>
      <p>#</p>
      <p>&nbsp;</p>
      <p># the user name and password to log into the mysql server</p>
      <p>hosts = localhost</p>
      <p>user = mail</p>
      <p>password = secret</p>
      <p>&nbsp;</p>
      <p># the database name on the servers</p>
      <p>dbname = mail</p>
      <p>&nbsp;</p>
      <p># the table name</p>
      <p>table = USER</p>
      <p>&nbsp;</p>
      <p>select_field = FILTER</p>
      <p># OK : ignore filter</p>
      <p># DUNNO : filter </p>
      <p>where_field = MAIL </p>
      <p>additional_conditions = and STATUS = 1 limit 1</p></td>
  </tr>