We have an Exchange server that housed 2 email domains but one of the domains needs to be removed

Our company was setup with two email domains on our exchange server.  Recently one of the companies was spun off and now hosts their email with a hosting company.  They receive all of their mail just fine unless it was sent from within our network.  It seems that our network still thinks the domain is here but it is not.  I found another postini about a similar issue but I tried what was suggested but nothing happened.  I need to get this fixed but have not been able to do so on my own.
duanewdsaAsked:
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mass2612Commented:
Hi,

You probably have/had at least two Recipient Policies on your server. Take a look for this using ESM > Recipients > Recipient Policies and see if you can still see the policy for the second SMTP domain.

Also check your DNS setup. What happens from your Exchange server when you execute an nslookup for the second SMTP domain i.e.

nslookup -type=mx domain.com
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duanewdsaAuthor Commented:
I ran the nslookup command and it returned the the server name of our main server and its IP address and then under "Non-athouritative Answer"  it gave the following:

dynamicssouthwest.com MX preference = 10, mail exchanger = dynamicssouthwest.com.inbound10.mxlogic.net

dynamicssouthwest.com MX preference = 20, mail exchanger = dynamicssouthwest.com.inbound10.mxlogicmx.net

dynamicssouthwest.com       nameserver = ns60.worldnic.com
dynamicssouthwest.com       nameserver = ns59.worldnic.com
nc59.worldnic.com                internet address = 205.178.190.30
nc60.worldnic.com                internet address = 205.178.189.30

What shoudl I look at next.  I need to verify but I know they took dynamicssouthwest.com email to a new hosting service

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mass2612Commented:
You might want to try to flush the DNS cache on your Exchange server i.e. ipconfig /flushdns

I am seeing different IP information for the domain.
Non-authoritative answer:
dynamicssouthwest.com   MX preference = 20, mail exchanger = dynamicssouthwest.c
om.inbound10.mxlogicmx.net
dynamicssouthwest.com   MX preference = 10, mail exchanger = dynamicssouthwest.c
om.inbound10.mxlogic.net
 
dynamicssouthwest.com.inbound10.mxlogic.net     internet address = 208.65.145.2
dynamicssouthwest.com.inbound10.mxlogic.net     internet address = 208.65.144.3
dynamicssouthwest.com.inbound10.mxlogic.net     internet address = 208.65.144.2
dynamicssouthwest.com.inbound10.mxlogic.net     internet address = 208.65.145.3

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mass2612Commented:
Hi mods,

Just recieved a good answer email and then this delete question email. Who knows whats going on?
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