mail滞留的问题
在公司内网用的一个mail服务，用的是sendmail和apache+openwebmail
做好后测试发现可发不可收：
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[root@mail mail]# mailq
/var/spool/mqueue (6 requests)
-----Q-ID----- --Size-- -----Q-Time----- ------------Sender/Recipient-----------
n527noJi002951 56 Tue Jun 2 15:49 <good@nihao.cn>
(host map: lookup (nihao.cn): deferred)
<good@nihao.cn>
n527o7bY002965 56 Tue Jun 2 15:50 <good@nihao.cn>
(host map: lookup (nihao.cn): deferred)
<good@nihao.cn>
n5289U28003167 783 Tue Jun 2 16:09 <good@nihao.cn>
(host map: lookup (nihao.cn): deferred)
<good@nihao.cn>
n527kKwg002727 725 Tue Jun 2 15:46 <good@nihao.cn>
(host map: lookup (nihao.cn): deferred)
<good@nihao.cn>
n527kiYR002746 759 Tue Jun 2 15:46 <good@nihao.cn>
(host map: lookup (nihao.cn): deferred)
<good@nihao.cn>
n527fC64002549 56 Tue Jun 2 15:41 <good@nihao.cn>
(host map: lookup (nihao.cn): deferred)
<good@nihao.cn>
Total requests: 6
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全部在这里，错误为
(host map: lookup (nihao.cn): deferred)
解析不到域名的问题，解决办法
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[root@mail mail]# vi /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 webserver localhost.localdomain localhost
::1 localhost6.localdomain6 localhost6
192.168.0.253 nihao.cn
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然后
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[root@mail mail]# /etc/rc.d/init.d/sendmail restart
Shutting down sm-client: [ OK ]
Shutting down sendmail: [ OK ]
Starting sendmail: [ OK ]
Starting sm-client: [ OK ]
[root@mail mail]# /etc/rc.d/init.d/dovecot restart
Stopping Dovecot Imap: [ OK ]
Starting Dovecot Imap: [ OK ]
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然后测试：ok
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