How to Configure a Relay Connector for Exchange Server 2. In most Exchange Server 2. Exchange server.  This is common with multi function devices such as network attached printerscanners, or applications such as backup software that send email reports. SMTP communication is handled by the Hub Transport server in an Exchange organization. The transport service listens for SMTP connections on its default Receive Connector. However, this connector is secured by default to not allow anonymous connections ie, the type of connection most non Exchange systems will be making. How To Install Microsoft Cdo For Exchange' title='How To Install Microsoft Cdo For Exchange' />You can see this in effect if you telnet to the server on port 2. SMTP communications. EX3. exchangeserverpro. Microsoft ESMTP MAIL Service ready at Wed, 1. Au. g 2. 01. 0 1. EX3. exchangeserverpro. Hello 1. 92. 1. 68. Client was not authenticated. EX3. exchangeserverpro. Microsoft ESMTP MAIL Service ready at Wed,1. Au. 25. 0EX3. exchangeserverpro. Hello1. 92. 1. 68. Client was notauthenticated. For some Hub Transport servers that are internet facing, anonymous connections may already be enabled. In those cases relay would still be denied but will behave differently than the first example. EX3. exchangeserverpro. Microsoft ESMTP MAIL Service ready at Wed, 1. A6jgD.png' alt='How To Install Microsoft Cdo For Exchange' title='How To Install Microsoft Cdo For Exchange' />Its a mess. MAPI or CDO via a. NET interop DLL is officially unsupported by Microsoftit will appear to work fine, but there are problems with memory leaks due to. Prabhat Nigam Microsoft MVP Office Servers and Services CTO GO5 LLC MCSE Messaging 2013, MCITP 20102007, MCSE since 1999 Ex Microsoft Exchange PSS Employee. Ive got a simple VB script that opens up an Excel Spreadsheet, checks for dates in a single column, then fires off an email. I put it as a scheduled task. Au. g 2. 01. 0 2. EX3. exchangeserverpro. Hello 1. 92. 1. 68. Sender OK. rcpt to somebodygmail. Unable to relay. 22. EX3. exchangeserverpro. Microsoft ESMTP MAIL Service ready at Wed,1. Au. 25. 0EX3. exchangeserverpro. Hello1. 92. 1. 68. Youll note that relay is denied if I try to send from an hotmail. Exchange organization. As we are moving towards the release date we need to focus on what are the new features coming in to Exchange 2016 in compare. I have to write a VBScript which will run on a Windows Server 03 no Office, SMTP, etc. This script should send EMails. But with Anonymous Users enabled on the Receive Connector I can send from an hotmail. EX3. exchangeserverpro. Microsoft ESMTP MAIL Service ready at Wed, 1. Au. g 2. 01. 0 2. Bay Area Salaries Senior Software Engineer. EX3. exchangeserverpro. Hello 1. 92. 1. 68. The test server I want to run the script on is. They. Sender OK. rcpt to alan. Recipient OK. 3. 54 Start mail input end with. Id2 Queued mail for delivery. EX3. exchangeserverpro. Microsoft ESMTP MAIL Service ready at Wed,1. Au. 25. 0EX3. exchangeserverpro. Hello1. 92. 1. 68. Start mail input endwith. Id2Queued mail fordelivery. However if I try to relay out to an external recipient, the Exchange server does not allow it. EX3. exchangeserverpro. Microsoft ESMTP MAIL Service ready at Wed, 1. Au. g 2. 01. 0 2. EX3. exchangeserverpro. Hello 1. 92. 1. 68. Sender OK. rcpt to alertsmanagedserviceprovider. Unable to relay. 22. EX3. exchangeserverpro. Microsoft ESMTP MAIL Service ready at Wed,1. Au. 25. 0EX3. exchangeserverpro. Hello1. 92. 1. 68. To permit a non Exchange server to relay mail we can create a new Receive Connector on the Hub Transport server. Launch the Exchange Management Console and navigate to Server Management, and then Hub Transport. Select the Hub Transport server you wish to create the new Receive Connector on, and from the Actions pane of the console choose New Receive Connector. Give the new connector a name such as Relay and click Next to continue. You can leave the local network settings as is, or optionally you can use a dedicated IP address for this connector if one has already been allocated to the server. Using dedicated IP addresses for each connector is sometimes required if you need to create connectors with different authentication settings, but for a general relay connector it is not necessary to change it. Highlight the default IP range in the remote network settings and click the red X to delete it. Now click the Add button and enter the IP address of the server you want to allow to relay through the Exchange server. Click OK to add it and then Next to continue. Click the New button to complete the wizard. The Receive Connector has now been created but is not yet ready to allow the server to relay through it. Go back to the Exchange Management Console, right click the newly created Receive Connector and choose properties. Select the Permission Groups tab and tick the Exchange Servers box. Select the Authentication Tab and tick the Externally Secured box. Apply the changes and the Receive Connector is now ready for the server to relay through. EX3. exchangeserverpro. Microsoft ESMTP MAIL Service ready at Wed, 1. Au. g 2. 01. 0 2. EX3. exchangeserverpro. Hello 1. 92. 1. 68. Sender OK. rcpt to alertsmanagedserviceprovider. Recipient OK. 3. 54 Start mail input end with. EX3. exchangeserverpro. In. ternal. Id3 Queued mail for delivery. EX3. exchangeserverpro. Microsoft ESMTP MAIL Service ready at Wed,1. Au. 25. 0EX3. exchangeserverpro. Hello1. 92. 1. 68. Start mail input endwith. EX3. exchangeserverpro. Internal. Id3Queued mail fordelivery. Because the remote IP range has been secured to that single IP address, any other servers on different IP addresses still wont be able to relay through the Exchange Server. From any other IP address not included in the remote IP range on the Receive Connector relay will be denied. EX3. exchangeserverpro. Microsoft ESMTP MAIL Service ready at Wed, 1. Au. g 2. 01. 0 2. EX3. exchangeserverpro. Hello 1. 92. 1. 68. Sender OK. rcpt to alertsmanagedserviceprovider. Unable to relay. 22. EX3. exchangeserverpro. Microsoft ESMTP MAIL Service ready at Wed,1. Au. 25. 0EX3. exchangeserverpro. Hello1. 92. 1. 68. You can later add more IP addresses, IP ranges, subnets, or even add multiple IP addresses to the Receive Connector using a script if necessary.