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	<title>LINUXQQ &#187; 整理一下杂七杂八的postfix+extmail的mail服务器架设维护笔记</title>
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		<title>整理一下杂七杂八的postfix+extmail的mail服务器架设维护笔记</title>
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		<pubDate>Tue, 21 Apr 2009 15:24:15 +0000</pubDate>
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		<category><![CDATA[整理一下杂七杂八的postfix+extmail的mail服务器架设维护笔记]]></category>

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		<description><![CDATA[整理一下杂七杂八的postfix+extmail的mail服务器架设维护笔记 前提: 做好DNS的A记录,MX(Mail Exchange mail交换记录) 如:upkiller.com 192.168.1.123     mx=mail.upkiller.com     mail.upkiller.com=192.168.1.123 检查: nslookup upkiller.com nslookup -type=MX upkiller.com 输出结果: upkiller.com       MX preference = 1, mail exchanger = mail.upkiller.com mail.upkiller.com internet address = 192.168.1.123 mail server的备份:可以设置多个邮件交换记录，设置MX优先级，安装多台的主机实现 如: ;Host Address (A记录) mail1.upkiller.com mail2.upkiller.com ;Mail Exchanges (MX记录) upkiller.com IN MX 1 mail1.upkiller.com upkiller.com IN MX 2 mail2.upkiller.com 邮件传递顺序，优先MX记录，如没有MX记录，尝试将邮件传给该域的A记录ip地址。 &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;- [...]]]></description>
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