Routing Mail : mail server with 2 NIC card

Unanswered Question
Jul 19th, 2009


Please se my architecture in attachement

user on network C cannot send and receive mail

Mail server is installed on win 2000 server

I use static route in the router but it dont work

How can i solve this problem please

I have this problem too.
0 votes
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
Jon Marshall Sun, 07/19/2009 - 12:06

Looking at your diagram the mail server is connected to network A and network D. I suspect the default-gateway on the mail server is pointing to an address on network D.

Jack works because he is the same network as one of the nic cards on the mail server so the default-gateway is not relevant.

John doesn't because when the mail server needs to send traffic back to John it uses it's default-gateway and sends it out to D.

So you have 2 choices -

1) On the Cisco 2811 NAT John's mail traffic to the address. That way the mail server will be able to send the traffic back to John


2) on the mail server itself add another route for the network so the mail server knows how to return the traffic -

route -p add mask

you need the -p in the above command to make sure the route stays across reboots of the mail server.


nicanor00 Fri, 07/24/2009 - 23:45

it works , I use the route -p add command

Thans for you help


This Discussion