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Configure Exchange Server 2003 able to relay message to authorized external email address

Posted on 2008-06-23
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Last Modified: 2013-11-30
Hi Experts

I need help. Kindly share your experience on how to do it.

My Exchange Server 2003 SP2 is running very well. My boss asked me a question, it brought me the attention on how to do it.

In Outlook using POP3 account, he clicks create new message, and view From: field, manually type his personal email address (e.g. tcf@yahoo.com), the rest is normal. So, he click Send button to send out this message, he received bounced message "Unable to deliver message to "tcf@yahoo.com":550 5.7.1".

I would wonder how I can configure my Exchange only accept tcf@yahoo.com as authorized external email address being able success relay to.

I sudden think of, my general manager also asked me this similar question last year.

Appreciated if you can help.
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Question by:chekfu
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uid94130 earned 500 total points
ID: 21845723
To allow him to send a message for an external account you can add the IP address of the user in the Relay allowed list (make sure the IP address is reserved and does not change).

The Relay settings can be found in the Exchange System Manager console at:
- expand Administrative groups
- expand "Your Admin group" (select the one where the mailbox of the user is)
- expand Servers
- expand "Your server" (select the one where the mailbox of the user is)
- expand Protocols
- expand SMTP
- right click on "Default SMTP Virtual Server" and choose "Properties"
- select the "Access" tab
- click on the "Relay" button
- click on "Add" button and add the user's IP address.
- close all open windows with "Apply" and "Ok"

Please be careful with this option as the user can type anything in the from field.
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Author Comment

by:chekfu
ID: 21846140
Wow, awesome!!

It works.
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