Hi All I want to restrict the access to my SMTP Server, and not allow anybody to relay through it. To achieve that I made the following configuration: System Manager - My Exchange Server - Protocols - SMTP Server Properties- and then to the Access Tab, and I click authentication. I removed the check on Anonymous access and check Basic Authentication. That stopped all relay that can be made using my SMTP Server, even when I provide a user name and password to the System who needs to relay through my Server. In the Connection tab, I didn't restrict any IP Address. Please help

Ok, there is a difference between anonymous relay and anonymous access. If this is an internet facing bridgehead, you have to allow anonymous access. What do you have for relay restrictions? http://www.petri.co.il/preventing_exchange_2000_2003_from_relaying.htm http://support.microsoft.com/kb/895853

Hello Alaaay, Follow the steps provided my AndyD_ . And lets us know. It will fix your problem.MicroSoft Exchange Admin. & Connector EXCHANGE2010, MCSE, MCTS, MCSA MESSAGING, CCNA & GNIIT

thankNeed Help

Hi All I worked as following: 1. Go to Access – Authentication – Remove the Check on Anonymous access and Basic authentication. 2. Go To users, and make a check on relay permissions for authenticated users. 3. Go To relay – Make a check on Allow authenticated users to relay. I tried the WSUS to send an alert, and I used the Administrator username and password, but the WSUS gave me an error "User doesn't have permission to submit mail to this server, client was not authenticated". I activated advanced logging, and I saw the following error in the event viewer "The TCP Client ### didn't authenticate before attempting to send mail –access was denied). Could you please help

Hi, Please try to enable Basic Authentication to check this issue. Thanks Allen