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heq98Flag for United States of America

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upgraded to Exchange 2007, I can send out email, but couldn't receive email.

We recently upgraded to Exchange 2007 and we have not remove our Exchange 2003 yet,
 I can send out email to Echange 2003 email box or outside email, but couldn't receive  email the exchange 2003 or outside.
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foxpc123

What happens if you try a smtp test - try www.mxtoolbox.com put in your domain and then run a SMTP test - can you post the result please.
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Akhater
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Are the connectors between the two servers there? There should be two of them.
If both servers are still up, there should be a routing group connector, can you verify this is there?

http://social.technet.microsoft.com/Forums/en-US/exchange2010/thread/f379cce6-b440-470e-b262-5a9f0eae53a4
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ASKER

Thank you all for the Answers.

1. foxpc123:my two servers in same doman, not the DNS issue.

2. Akhater:  I have a smart host relay configured on my SMTP virtual server in 2003,
If your Exchange organization contains more than one computer running Exchange, but after I cleaned data in the Smart host box,
i even can't send email outside or the new exchange 2007 millbox(mayemail@yahoo.com)
3.ryan80:from my 2003 exchange system manager, has two connectors, one between the two servers(2003server-2007server), other 2003 server-internet(smart host). on 2007 has same.
4.Metaltree:yes, both servers are still up, has two routing group connector on each server, but my new server is 2007 not 2010.

any other ideal??

Thanks so much!
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My question is how the mail flow going?
A.      Smart host
B.      2003 server
C.      2007 server
D.      Outside server(mail.yahoo.com)
Now:  working Good
      1. B (2003S)->A (Smart Host)->D (Outside server)
      2. D (Outside server)-> A (Smart Host)-> B (2003S)
            3. C (2007S)-> B (2003S) -> A (Smart Host)->D (Outside server)
   Not working
      4. B (2003S) X> C (2007S)
      5. D (Outside server) -> A (Smart Host) -> B (2003S) X> C (2007S)
      
I think the problem between B (2003S) and C (2007S), C to B is working, but B to C is not working.
How can I test it?
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Akhater: I will try it, thank you very much!
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Keep me posted
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ok so let me sort this out

1. 2007 -> 2003 working
2. 2003 ->  2007 working
3. internet -> 2003 working
4. internet -> 2007 not working

is that correct ?
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Akhater,
yes, 4. internet -> 2007 not working.
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those steps very important, shows where is the problem.