External Relay Setup User Authentication

Have you tried adding the server's IP to allowed senders group?

1. Exchange Management Console --> Server Configuration

2. Right-click Hub Transport, select properties

3. Select Network tab, then add user's IP under "Receive mail from remote servers that have these IP addresses"

Yes - I setup a new recieve connector and added the server IP address. That was successful. The problem is that the "user unknown: 550 5.5.1" The user who sends the message is a known user on the Exchange box and the name/password is correct.

Do you have additional info as to what's happening with your relay?

Not sure if you may be experiencing a similar issue, authenticated user, but read the thread below:

http://www.petri.co.il/forums/showthread.php?t=34194

Add-AdPermission -Identity "Default Receive Connector" -User "NT AUTHORITY\Authenticated Users" -ExtendedRights ms-Exch-SMTP-Accept-Any-Sender

I added that command in the Exchange shell. When I run the software to generate the email from the user I now get a "User Unknown" failure. . .

I tried adding the SELF as a user but got the following error:

8-7-2011-6-45-15-PM.png

I thought so ..  .but I read the article and that is what is said. The only command I really ran on the default connector is the:


Add-AdPermission -Identity "Default Receive Connector" -User "NT AUTHORITY\Authenticated Users" -ExtendedRights ms-Exch-SMTP-Accept-Any-Sender


How can I undo that?

Run Remove-AdPermission -Identity "Default Receive Connector" -User "NT AUTHORITY\Authenticated Users" -ExtendedRights ms-Exch-SMTP-Accept-Any-Sender

You can also change it from ADSIEDIT.MSC