Help connecting two exchange domains on same LAN without internet

[jwigginjr]

I am trying to connect two different exchange domains on

the same LAN without internet. I will include basic

information below. My question is this network is not

connected to the internet so how can we send mail to

each other? From what I read it looks like we need to

configure SMTP send connectors and use MX records? We do

not use a smart host.

I tried setting up the SMTP connector and MX

records but it seems I am missing something because it

is not working. From what we know are firewalls are not

blocking SMTP. Do I need to create a MX record for only

my mail server in my DNS or do I need to create a link

to his mail server also in my DNS or does he only create

the MX record for his own in his DNS? It seems I need a

correct combination of settings in the exchange server

and DNS but could use some assistance on what that might

be.



My Info:

Windows Server 2008 R2

Exchange 2010 (updated)

Exchange Server name: myexchange (using generic names

and IP)

Domain: mydomain.com

FQDN: myexchange@mydomain.com

IP of Exchange server: 192.168.1.1

Their Info

Windows Server 2008 R2

Exchange 2010 (updated)

Exchange Server name: theirexchange (using generic names

and IP)

Domain: theirdomain.com

FQDN: theirexchange@theirdomain.com

IP of Exchange server: 216.168.1.2