RE: Simple internal IP address resolution for mail

The standard is to have an internal DNS server with all of your private
IP address.  If they are running Active Directory, this is already in
place.  Change your DHCP scope to use the internal DNS server.  Make
sure your network people add the appropriate MX record on your internal
DNS server to point to the internal name / IP address of your mail
server. 


Christopher Bipes
Information Services Director
CrossCheck, Inc.

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Neil Palmer
Sent: Thursday, October 26, 2006 1:26 PM
To: Midrange Systems Technical Discussion
Subject: Simple internal IP address resolution for mail

I'm looking for an easy way to do the following.

- salesman with laptop accesses mail externally with Outlook Express
using the company's external IP address, by using POP server defined as
mail.theircompany.com - works fine outside the office

- when in the office (as there is no internal DNS server) this resolves
to the external IP address, and can not connect

- all I want to do is have mail.theircompany.com resolve on the local
LAN in the office to the internal IP address of the iSeries
(192.168.99.99) instead of the external public IP address (that their
ISP's DNS servers are returning)

Is there a simple way to do this using the 70-POP Server option in the
DHCP server configuration (which IS running on their iSeries), OR do I
have to configure a DNS server on the iSeries to resolve this ONE
address (mail.theircompany.com) and have the present DNS server (which
is actually the ISP's DSL router) continue to resolve all other address
requests ?