Ok did a few searches and did not see anything and am not sure if i am missing something simple.. I have built an 07 server and we have a 03 server.. I have set up a test users mailbox on my 07 server.. (created user in AD) added mailbox from 07 manager) I can send mail from my 07 user to boxes on the 03 server..and if i cc my 07 users he gets the mail to.. I can not send from my 03 box to my 07 user.. I get mesage delayed and than a few hours laterfailed.. I feel like i may have missed something basic in my set up / connectors / transports.. can someone point me in the right direction..David

On the 2007 box open ESM and do a get-routinggroupconnector | fl * then check your source and target transport servers to make sure you have an 03 and 07 server there to send mail between the 2 routing groups. It sound like the routinggroupconnector from 2003 to 2007 may be incorrectly configured. also whats the error from the failure message you get back? Sr. Exchange Engineer - Constellation Energy

I check the routing groups.. looks like my 03 box is there... I have the first group & target group I dont want to copy all the info here but both servers are in there... as each others target & source...

Hi, I belive that you have given name of exchange 2003 BH server as routing server when installed first exchange 2007 trasnport role.Try to create RGC between 2003 and 2007 using below cmdlet and check further. New-RoutingGroupConnector -Name "Interop RGC" -SourceTransportServers "Ex2007Hub1.contoso.com" -TargetTransportServers "Ex2003BH1.contoso.com" -Cost 10 -Bidirectional $true -PublicFolderReferralsEnabled $tru The first routing group connector is created when the first Hub Transport server role is installed on a computer in the Exchange organization. Before you create additional routing group connectors, perform this procedure on every Exchange2000and Exchange2003server in the organization. When you suppress minor link state updates, the servers that are running Exchange2000and Exchange2003will not mark connectors as down. This procedure will make sure that earlier versions of Exchangewill only use least cost routing and will not try to calculate an alternative route.How to Suppress Link State Updates ::http://technet.microsoft.com/en-us/library/aa996728.aspx Anil

Do you have smarthost configured on Default SMTP Virtual server of Exchange 2003? This happens if it is configured, remove smarthost from there and create a SMTP connector configured with smarthost for that mail delivery... How to find Default SMTP Virtual Server has smarthost? EMS -> Exchange 2003 -> Protocols -> SMTP -> Default SMTP Virtual Servers -> Properties -> Delivery -> Advance -> SmartHost option, make sure nothing is here... Amit Tank | MVP: Exchange Server | MCITP: EMA | MCSA: M | http://ExchangeShare.WordPress.com

Yes we have an ironport and the smarthost was on the defualt SMTP.. cleared it and that works...what is the underlying issue with this?

Some caveats are there while configuring SmartHost on SMTP Virutal Server, refer below article for further details... Configuring a Smart Host on a SMTP Virtual Server http://technet.microsoft.com/en-us/library/aa996082(EXCHG.65).aspxAmit Tank | MVP Exchange Server | MCITP: EMA | MCSA: M | http://ExchangeShare.WordPress.com

perfect thank you - 1 more question ..I now have 2 connectors... the one i created above and i am assuming the one that was created during install - going both ways on both serversInterOp RGC andMAILSERV to MAILSERVER Is it safe to assume (for cleanup purposes and practice) I can use the cmdlet to remove both connectors and than recreate 1

Have you created additional routing group connector with New-RoutingGroupConnector? If so yes you can remove just that with below cmdlet. Remove-RoutingGroupConnector http://technet.microsoft.com/en-us/library/aa998645.aspxAmit Tank | MVP Exchange Server | MCITP: EMA | MCSA: M | http://ExchangeShare.WordPress.com