young_089 发表于 2007-3-16 15:26:01

你的这个IP不能上外网?

jbiscuit 发表于 2007-3-16 15:49:41

你防火墙只对MAILSERVER 开放了POP3和SMTP这两个端口吗？53号端口没有开放

davidho 发表于 2007-3-16 16:08:03

端口53是做什么用的,我的25是开放的.TELNET如下:

c:\>telnet server 25
220 server.abc.com.hk Microsoft ESMTP MAIL Service, Version: 6.0.3790.1830 rea
dy atFri, 16 Mar 2007 16:07:12 +0800

davidho 发表于 2007-3-16 16:52:58

我的路由器配置如下:
Router#sh conf
Using 4202 out of 29688 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router
!
boot-start-marker
boot-end-marker
!
enable secret 5 $1$nPRM$.U7HLvJPUJxxyX4O8PJrS.
enable password ******!
no aaa new-model
!
resource policy
!
mmi polling-interval 60
no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180
ip subnet-zero
!
!
no ip dhcp use vrf connected
!
!
ip cef
no ip ips deny-action ips-interface
!
no ftp-server write-enable
!
!
!
!
!
!
!
!
interface FastEthernet0
ip address 192.168.2.1 255.255.254.0
ip nat inside
ip virtual-reassembly
speed auto
no cdp enable
!
interface Serial0
ip address 61.145.222.234 255.255.255.248
ip nat outside
ip virtual-reassembly
encapsulation ppp
!
ip classless
ip route 0.0.0.0 0.0.0.0 Serial0
no ip http server
no ip http secure-server
!
ip nat inside source list 1 interface Serial0 overload
ip nat inside source static tcp 192.168.2.3 21 61.145.222.234 21 extendable
ip nat inside source static tcp 192.168.2.3 22 61.145.222.234 22 extendable
ip nat inside source static tcp 192.168.2.2 25 61.145.222.234 25 extendable
ip nat inside source static tcp 192.168.2.3 80 61.145.222.234 80 extendable
ip nat inside source static tcp 192.168.2.2 110 61.145.222.234 110 extendable
ip nat inside source static tcp 192.168.2.2 119 61.145.222.234 119 extendable
ip nat inside source static tcp 192.168.2.2 135 61.145.222.234135 extendable
ip nat inside source static tcp 192.168.2.2 143 61.145.222.234143 extendable
ip nat inside source static tcp 192.168.2.2 379 61.145.222.234379 extendable
ip nat inside source static tcp 192.168.2.2 389 61.145.222.234389 extendable
ip nat inside source static tcp 192.168.2.2 443 61.145.222.234 443 extendable
ip nat inside source static tcp 192.168.2.2 563 61.145.222.234563 extendable
ip nat inside source static tcp 192.168.2.2 691 61.145.222.234691 extendable
ip nat inside source static tcp 192.168.2.2 993 61.145.222.234993 extendable
ip nat inside source static tcp 192.168.2.2 995 61.145.222.234995 extendable
ip nat inside source static tcp 192.168.2.3 5432 61.145.222.2345432 extendable
ip nat inside source static tcp 192.168.2.2 5800 61.145.222.2345800 extendable
ip nat inside source static tcp 192.168.2.2 5900 61.145.222.234 5900 extendable
ip nat inside source static tcp 192.168.2.2 80 61.145.222.2348080 extendable
!
ip dns server
!
access-list 1 permit 192.168.2.0 0.0.0.255
!
!
control-plane
!
!
line con 0
line aux 0
line vty 0 4
password ******
login
transport input none
line vty 5 15
password ******
login
transport input none
!
end

davidho 发表于 2007-3-24 10:55:47

解决过程

解决过程
从路由器查到server,最后发现是DNS的问题.

这种问题经常发生在DC,DNS,EXCHANGE等服务加于一体的server.

要建造强悍的邮件系统,内部有两台DNS是必不可少的.

还有就是DNS转发设置中,一定要记得勾选UDP和TCP解析.

本server的DNS用本身的IP,然后在DNS中转发器设置本地ISP商提供的DNS

ququ 发表于 2007-3-24 14:08:52

感谢分享

roytocn 发表于 2007-3-24 17:38:52

DNS: 202.96.128.166 / 202.96.128.68
你试呢个

Ｅ－ＭＡＩＬ：ＨＺ．ＣＨＵＡＮＧＬＩ＠ＧＭＡＩＬ．ＣＯＭ

钉子 发表于 2007-3-24 18:59:28

这个问题和昨天网友的问题是一样的．

powercyk 发表于 2009-1-10 16:51:51

原帖由 davidho 于 2007-3-16 16:08 发表 http://www.5dmail.net/bbs/images/common/back.gif
端口53是做什么用的,我的25是开放的.TELNET如下:

防火墙上要开放DNS 53端口,内部才能正常访问外部DNS,进行域名解析

leon63724378 发表于 2009-1-13 11:23:23

晕,我怎么没在我的DNS服务器上找到UDP和TCP解析.
,能否指教下在那里购选
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查看完整版本: 邮件只能收,不能发,跪求解决办法!(已经解决)