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5.7.1 Unable to relay error, Exchange 2007

Posted on 2010-11-21
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Last Modified: 2012-05-10
Hello,

I get error 5.7.1 Unable to relay when i try to send from an internal server to an external domain. This issue is only occuring on one of the newly deployed servers( i will call it server X). i have no issue sending from server x to internal domain users.

When I checked the message tracking tool, i found that server X uses the default receive connector while all other servers use the custom receive connector (server connector). I don't know if this is the main cause of the problem, but all other servers that are using (server connector) can send to external domain normally. I have added Server X ip to the remote ip list.

The receive connectors are configured as follow:

- Default connector and server connector, have the same IP address and same port 25
- Default connector Permissiongroup :AnonymousUsers, ExchangeUsers, ExchangeServers, ExchangeLegacyServers
-Server connector permissiongroup : AnonymousUsers, ExchangeUsers, ExchangeServers
cyServers
-Default connector Authentication: Basic,Exchange server,Integrated Windows
-Server connector Authentication : TLS. Externally secured

Thank you
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Question by:GRMNW
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Akhater earned 500 total points
ID: 34183658
Both connectors cannot use the same ip and port you will need to select a separate ip for the other connector and configure all servers that needs relaying to use that ip
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Author Comment

by:GRMNW
ID: 34187364
We are using "ironmail gateway" to receive mails from the internet. Can I disable the Default connector in this case and add the ironmail gateway IP to the server connector? Hence i will be using only one server connector with port 25.

Internet --Ironmail --Exchange Hub -- Server Hub

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Expert Comment

by:Akhater
ID: 34187375
yes you could do this if you have no security concerns (since your exchange is not connected to the internet)
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Author Comment

by:GRMNW
ID: 34194120
Thank you Akhater for your reply.

I have disabled the "Default" connector, and added the Email Gateway IP to the "Server" connector.

But when i check the message tracking logs, i see that the default connector is still being used, when any email is received from the Email Gateway.

The default connector was disabled using EMC, by following the steps in this link
http://technet.microsoft.com/en-us/library/aa996750(EXCHG.80).aspx

Is there any extra steps to be done?

PS. We are using Exchange 2007 SP1 rollup6
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Expert Comment

by:Akhater
ID: 34195241
no nothing .... Disabling the connector should be the only thing to be done !

did you try to restart the msexchangetransport services ? it should be needed but just in case
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Author Comment

by:GRMNW
ID: 34202638
The Default connector is no longer being used after restarting the transport service on the hub transport.

Thank you for your help.
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Expert Comment

by:Akhater
ID: 34203987
You are welcome and thanks for the points
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