ubuntu IRedMail 安装手记 （2）

error：

用客户端能正常登录收发邮件，但用域名登录报错，

nslookup结果如下：

C:\Documents and Settings\l**>nslookup mail.m.cn
DNS request timed out.
    timeout was 2 seconds.
*** Can't find server name for address 192.168.3.7: Timed out
*** Default servers are not available
Server:  UnKnown
Address:  192.168.3.7

DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
*** Request to UnKnown timed-out

解决：

关闭iptables或者设置开放53端口后ok

iptables -A INPUT -p udp --dport 53 -j ACCEPT

iptables配置说明
https://help.ubuntu.com/community/IptablesHowTo