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 From:  Johan Roeloffse <johan at risc dot co dot za>
 To:  "Zadikem, Travis-taz" <tzadikem at picosecond dot com>
 Cc:  "Monowall (E-mail)" <m0n0wall at lists dot m0n0 dot ch>
 Subject:  Re: [m0n0wall] Correct setup for a firewall and 2 mail servers....HELP, please!
 Date:  Tue, 28 Dec 2004 21:50:31 +0200
Evening Travis

The DNS database contains an MX(Mail Exchange) entry that forwards all 
email for your domain web.picosecond.com to Your internal 
network (192.168.1.x) is shielded from the Internet by the firewall, all 
mail messages are forwarded to the firewall and the firewall intern 
forward it to the internal mail server ( If you are 
setting up a new mail server with an different IP address as the 
original mail server you should have a problem. The rule on the firewall 
only allows for mail to be forwarded to, edit the rule on 
the firewall to reflect the ip address of the new mail server.

Only if you place the 2 mail-servers directly on the Internet (in front 
of the firewall) would you need 2 extra addresses.


Zadikem, Travis-taz wrote:

>About 12/9/04 I sent an email to the list about a help with a dual mail server setup. I am not able
to get it
>to work correctly and believe the original person who setup the firewall had a misunderstanding. 
As it appears
>right now, the WAN address on the firewall is  There is a rule that forwards anything
from (port 25)
>to an internal machine at  I am trying to setup a new email server that will replace
the old one.  
>Can someone please enlighten me as to what the correct setup and an example DNS entry would look
like.  I believe
>I really need 3 WAN addresses.  1 for the firewall, 1 for mail server A and 1 for mail server B,
but am not sure.