How do I modify SMTP Relay in Active Directory Site

I have a mixed exchange 2003 exchange 2010 environment.

I had my original exchange 2010 server die unexpectedly.  Ever since then none of my other 2010 exchange servers can send e-mail to my exchange 2003 server.

When I bring up the queue viewer I am seeing a next hop domain that contains my original 2010 server and all the messages are stuck within it.

My hunch is the other 2010 exchange servers where relaying through the original exchange 2010 server to get to the 2003 recipients however now that my original 2010 server is gone none of them can connect to the exchange 2003 organization.

How can I either create a new SMTP relay to my exchange 2003 organization or can I modify the existing misv-2008dc-misapp6 relay connector in some way so that another 2010 server can be used to relay to the 2003 organization?

The exact error message I am getting shows

Delivery Type: SMTP Relay in Active Directory Site:
Status: Retry
Last Error: 451 4.4.0 Primary target IP address responded with: "421 4.2.1 Unable to connect."  Attempted failover to alternate host, but that did not succeed.  Either there are no alternate hosts, or delivery failed to all alternate hosts.
Douglas-BrouhardAsked:
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Manpreet SIngh KhatraConnect With a Mentor Solutions Architect, Project LeadCommented:
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Manpreet SIngh KhatraConnect With a Mentor Solutions Architect, Project LeadCommented:
Ever since then none of my other 2010 exchange servers can send e-mail to my exchange 2003 server - Did you delete the Old RGC and create a new one for the new E2k3 and E2k10 servers ?

- Rancy
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Douglas-BrouhardAuthor Commented:
No, how do I delete the old RoutingGroupConnector and create a new one?
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Manpreet SIngh KhatraConnect With a Mentor Solutions Architect, Project LeadCommented:
First run the command to check the RGC's

Get-RoutingGroupConnector

- Rancy
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Douglas-BrouhardAuthor Commented:
OK.  It is the MISMAIL / MISV-2008DC server that died on me.  Mail2010 is still alive and well.  I was able to create a routing group for mail2010 now I'm trying to remove the first 2 routing groups.

[PS] C:\Users\misadmin\Desktop>get-RoutingGroupConnector

Name                      SourceRoutingGroup                             TargetRoutingGroup
----                      ------------------                             ------------------
MISV-2008DC-MISAPP6       Exchange Routing Group (DWBGZMFD01QNBJR)       First Routing Group
MISMAIL                   First Routing Group                            Exchange Routing Group (DWBGZMFD01QNBJR)
Mail2010                  First Routing Group                            Exchange Routing Group (DWBGZMFD01QNBJR)
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Douglas-BrouhardAuthor Commented:
OK, I got one of them out finally...  How do I create one now?

[PS] C:\Users\misadmin\Desktop>Remove-RoutingGroupConnector -Identity "Exchange Administrative Group (FYDIBOHF23SPDLT)\E
xchange Routing Group (DWBGZMFD01QNBJR)\misv-2008dc-misapp6"

Confirm
Are you sure you want to perform this action?
Removing routing group connector "Exchange Administrative Group (FYDIBOHF23SPDLT)\Exchange Routing Group
(DWBGZMFD01QNBJR)\misv-2008dc-misapp6".
[Y] Yes  [A] Yes to All  [N] No  [L] No to All  [?] Help (default is "Y"): a
[PS] C:\Users\misadmin\Desktop>get-RoutingGroupConnector

Name                      SourceRoutingGroup                             TargetRoutingGroup
----                      ------------------                             ------------------
MISMAIL                   First Routing Group                            Exchange Routing Group (DWBGZMFD01QNBJR)
Mail2010                  First Routing Group                            Exchange Routing Group (DWBGZMFD01QNBJR)
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Douglas-BrouhardAuthor Commented:
Rancy, you're my new hero.  That worked.  I don't know why I was suffering from such a mental block that I was trying to modify instead of delete recreate...

Any way, thank you...
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
Douglas - Your always welcome Sir :)

- Rancy
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