exchange 2003 to 2010 migration

I inherited an exchange 2003 setup with an exchange 2010 migration that looks half complete.

I can move mailboxes to the new server but users on the old server are unable to send email outside the domain. . I am not sure what hasn't been completed on the migration.  

I have a test mailbox moved to the 2010 exchange server.  It doesnt' send email  and users that are on the 2003 box can't send email either.  outside the domain that is.  I am sure there is something missing.

AD looks to be in good shape.

Thanks
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lefty431Asked:
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James HodgeConnect With a Mentor Managing DirectorCommented:
But do the mailboxes on the 2010 server successfully receive external email now?
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AmitIT ArchitectCommented:
Create a SMTP Send Connector in 2010 and point it to your Smart Host. Also create one bidirectional RG connector between 2003 and 2010 servers. For this you need to use Powershell. Let me know, if you need steps.
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lefty431Author Commented:
I haven't done anything yet, but moved 1 mailbox.  the user is able to send me email, but when I send him email from outside I get a 550 5.7.1 unable to relay.

on the router, I changed the firewall rules to point to the new server.  

I will look at your suggestion and see if I can create that..
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lefty431Author Commented:
I would need steps.  sorry. I missed that part.  if I move all of the mailboxes over to the new server would I need to do that still?
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James HodgeManaging DirectorCommented:
Hello,

1) create a Routing Group Connector between the 2003 and 2010 Server on the 2010 server(if there is one, delete it and re-create it). This will allow mail to flow between the two servers. You can test this by sending an email from a mailbox on the 2003 server to your test mailbox on the 2010 server.

2) Create a Send connector on the Hub Transport Server on 2010 (will allow outbound email from the 2010 server)

3) Remove the Send Connector on the 2003 Server (will force mailboxes on the 2003 server to route mail via the Hub Transport server (2010)).

4) Change your MX Records / Firewall to route email to the 2010 mail server (NAT port TCP 25 to your 2010 server) - allow DNS propagation time for this to take place.

5) Ensure there is a valid Receive Connector on the 2010 Server (and make sure Anonymous Users have access under the Permission Groups tab of the receive conenctor - common problem)

This will get you into a position where mail can flow in and out of the company. Then you can complete the migration :)

James Hodge
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lefty431Author Commented:
ok.  I will go through your list. some stuff might be done, but I will delete and redo..
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lefty431Author Commented:
On the send connector..

do I pic
Use domain names system dns
or
Rout mail through the following smart host?

I assume the firs tone since the 2003 server will be going away
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AmitIT ArchitectCommented:
Check 2003 SMTP configuration, if you are using ISP or DNS,
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lefty431Author Commented:
on which server?
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lefty431Author Commented:
i did the steps as described.  same problem.  users can send email if they are on the new server and they can't receive email from outside.  on either server.

I get no error messages NDR's either..
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James HodgeManaging DirectorCommented:
Does the routing group connector now work?  That's a starting point.

Unless there is a smart host configured on the 2003 connector and as long as DNS is configured correctly on the 2010, choose DNS to route email.
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James HodgeManaging DirectorCommented:
Regards receiving external email:

1) ensure your MX Record points at your static IP address. You can check this on mxtoolbox
2) chck your firewall forwards port 25 (smtp) to internal ip of 2010 server
3) ensure there is a valid receive connector on 2010 (with anonymous ticked)

James
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lefty431Author Commented:
1.  mx records point to the public IP.
  I changed the service group ans swapped IP addresses from the old exchange server to the new..  

2.  firewall is good.  with the rule change I made on 1.   no software firewall is on.
3.  I though I did this.  there are 2 listed.  one intranet and one internet..  assuming this is correct...
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James HodgeManaging DirectorCommented:
Yep. Key point is that the Anonymous group has permissions on this.

Do the settings under Organisation Configuration --> Hub Transport --> Accepted Domains look correct? Your @<domainname>.<com> should be here.
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James HodgeManaging DirectorCommented:
Server 2008 R2? Make sure TCP port 25 is open on the Windows Firewall.
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AmitIT ArchitectCommented:
login to exrca.com site and test the mail flow from there. You will find the root cause.
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lefty431Author Commented:
mail flow is successful from excra.

but users are not getting mail in their inbox.  they can send though..

I can connect to smtp server externally...
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