Exchange 2003 to 2010, unreachable destination

[chuk29]

#155652

I am having an issue with maiflow from exchange 2003 to exchange 2010.
My actual situation is:
Exchange 2003
– 3 mailbox servers
– 1 front end server
Exchange 2010
– 2 Mailbox
– 2 Hub servers
– 1 Cas server
the configuration is:
From one server 2003 and one HUB 2010 server:
– New-RoutingGroupConnector -Name “Interop RGC” -SourceTransportServers “p-hv-exchub1.mydomain.com” -TargetTransportServers “p-hv-hcex2003.mydomain.com” -Cost 10 -Bidirectional $true -PublicFolderReferralsEnabled $true
on the exchange 2010 HUB server I have the Internet send connector
– SMTP:*;25 to the TrendMicro spam filter.
– The TrendMicros pointer sends to the exchange 2010 hub server.
– The receive connector on the 2010 hub server allow anonymous users.
– I already update the Regsvr32 -u xlsasink.dll
– Also: HKLMSYSTEMCurrentControlSetServicesRESvcParameters : “SuppressStateChanges”=dword:00000001

The issue is:
From 2003 to Internet (Gmail) : works and goes through the “Interop RGC”
From 2010 to Internet (Gmail) : works
From Internet (Gmail) to 2003 : works and goes through the “Interop RGC”
From Internet (Gmail) to 2010 : works
From 2010 to 2003

---

: works
BUT
From 2003 to 2010

---

: Fail
– The message remain into the unreachable destination
– in the tracking the message last line is
SMTP: Message routed an dqueued for remote delivery
I have tried everything I know, rebooting the servers, install another exchange 2003. The problem seems to be in AD but i dont kwow where.
Any help.
Chuk

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