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can't forward mail to sendmail server on same domain

Posted on 2002-07-16
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Last Modified: 2010-03-05
I have a working Exchange 2K server that handles all my email on domain.com.  I set up a second mail server running sendmail on RedHat Linux 7.3 so that I can use the Majordomo list server.  I set up an Active Directory Contact that should forward emails sent to mylist@domain.com to mylist@sendmail.domain.com.

However, my Exchange server sends back an email saying that "The destination server for this recipient could not be found in Domain Name Service (DNS).  Please verify the email address and retry."

I can send messages to sendmail.domain.com from another sendmail instance on the same LAN, so I am assuming the problem is in the Exchange configuration.  I have an internal DNS server and I know there is an MX record for sendmail.domain.com.

Thanks in advance for any help
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Question by:buswash
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DrDickie earned 100 total points
ID: 7164303
Have you changed the settings in System Manager?
Global Settings / Internet Message Format and the default format.
On the advanced tab you may need to check the box for allow automatic replies and allow automatic forward.
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by:buswash
ID: 7165441
Hi,

DrDickie - thanks for the tip but I found another solution to the problem.

I did some research on the Microsoft Support site and found the following very helpful:

Support WebCast: Microsoft Exchange 2000 Server: DNS Troubleshooting in Transports
May 2, 2002

The solution to my problem: I had an external DNS server configured in my SMTP Virtual Server.  This was left over from a previous trouble-shooting session.

By having my ISP's DNS servers defined as external DNS servers, Exchange used these servers instead of my internal DNS to resolve domain names.  Once I removed the external DNS servers from my SMTP Virtual Server, everything worked fine.  I didn't need any special connectors or settings other than that.
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