Issue with routing and emails



  • Hi ,

    I have below setup :-

    Untitled

    And Facing this strange issue with emails.
    users are able to receive but not able to send emails , (Blank email is getting delivered i.e without any body and content)

    users have ip address from 192.168.1.10 to 192.168.1.13
    using gateway as 192.168.1.1

    On Pfsense i have written static route to 192.168.1.2 for subnet 172.16.0.0/16

    when i change gateway of user from 192.168.1.1 to 192.168.1.2 then emails works fine, but internet stops.

    Please suggest.


  • Rebel Alliance Global Moderator

    You are asymmetrical  Connect your downstream router your email server is on via transit.. All your hosts there on the transit 1.10, 1.11, etc..

    Also your layer 2 is also doing layer 3 it seems since the mpls link endpoint is there..

    Is your email server really on a /16 or is that the route you just created to cover the network its own?  Whats the gateway of your email server?




  • when i change gateway of user from 192.168.1.1 to 192.168.1.2 then emails works fine, but internet stops.

    You can't have more than one device on the same IP address.  Also, how do the users know how to reach the mail server?  That would need a specific route to it.



  • Also your layer 2 is also doing layer 3 it seems since the mpls link endpoint is there..

    I have updated the diagram ,  there is one router configured as MPLS endpoint (192.168.1.2) which is configured to forward everything to HUB location i.e layer 3 and at layer 3 reverse route is configured.

    Is your email server really on a /16 or is that the route you just created to cover the network its own?  Whats the gateway of your email server?

    Email Server is on some different IP but subset is common (and part of LAN )  , we have various VLAN configured (172.16.3.10, 4.10 , 5.10 )  , gateway of email server is 172.16.2.2


  • Rebel Alliance Global Moderator

    And its still Asymmetrical… Do it this way...






  • @johnpoz:

    And its still Asymmetrical… Do it this way...

    It is working now. Just followed your advice and updated my network topology.

    Thank you very much:)