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Mailflow issue when getting exchange 2007 and exchange 2010 to coexist

Posted on 2016-09-26
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Last Modified: 2016-10-01
I have migrated a test mailbox over to the new exchange 2010 server-


 I am able to send and receive an email from test email account to test email account at same address

 I am able to receive en email from an internal domain user email account but cannot send to an internal domain user email account

 I am able to send to an external email address and can receive email from an external email address

 Any ideas why I cant send to an internal email address
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Question by:IT_Field_Technician
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by:Todd Nelson
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Will you provide some clarification?

You can send from 2007 mailbox to 2010 mailbox ... yes or no?
You can send from 2010 mailbox to 2007 mailbox ... yes or no?
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by:IT_Field_Technician
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You can send from 2007 mailbox to 2010 mailbox ... yes
 You can send from 2010 mailbox to 2007 mailbox ... no
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by:Todd Nelson
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This typically has to do with how the two default receive connectors (Client "Servername" and Default "Servername") on the Exchange 2007 server have been configured.

If they were customized, that could be preventing mail flow one way.

If they were, you may need to add the IP address of the Exchange 2010 server to the receive connector(s) to get mail flow working.

Here are the settings for the "default" Exchange 2007 receive connectors...

"Default" Receive Connectors
Client General
Client Network
Client Authentication
Client Permission Groups
Default General
Default Permission Groups
Default Network
Default Authentication
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by:IT_Field_Technician
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I am getting delayed deliver responses now hours later -

 Toolbar  Forward  Move Delete   Junk  Close   Previous Item Next Item Close  
 
Content Area Delivery delayed:RE: rer  
Microsoft Outlook  
 
Sent:  Monday, September 26, 2016 4:30 PM  
To:  user
Attachments:  
 
 
 
Delivery is delayed to these recipients or groups:

Administrator (Administrator@domain.com)

Subject: RE: rer

This message hasn't been delivered yet. Delivery will continue to be attempted.

The server will keep trying to deliver this message for the next 1 days, 19 hours and 53 minutes. You'll be notified if the message can't be delivered by that time.
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by:Todd Nelson
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Those transport messages are typical after a message has been in the queue for a while without a successful delivery.  The NDR typically occurs after 72 hours the message was originally sent.
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I resolved my issue and mail is now flowing in all directions for all email accounts on both exchange servers - Thanks you so much for helping me figure this out - now only tame the rest of this monster!!!!!

 I was able to go into the receive connector for my app and enable exchange server authentication under the authentication tab. I also had to enable exchange servers under permission groups tab.
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by:Todd Nelson
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Sweet! Glad it's working for you now.
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by:IT_Field_Technician
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Thanks!
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