220 Microsoft ESMTP MAIL Service ready at Wed, 18 Auīecause the remote IP range has been secured to that single IP address, any other servers on different IP addresses still won’t be able to relay through the Exchange Server. Select the Authentication Tab and tick the Externally Secured box.Īpply the changes and the Receive Connector is now ready for the server to relay through. Select the Permission Groups tab and tick the Exchange Servers box. Go back to the Exchange Management Console, right-click the newly created Receive Connector and choose properties. The Receive Connector has now been created but is not yet ready to allow the server to relay through it.
Click OK to add it and then Next to continue.Ĭlick the New button to complete the wizard. Now click the Add button and enter the IP address of the server you want to allow to relay through the Exchange server. Highlight the default IP range in the remote network settings and click the red X to delete it. 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. 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. Give the new connector a name such as “Relay ” and click Next to continue. 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. Launch the Exchange Management Console and navigate to Server Management, and then Hub Transport. To permit a non-Exchange server to relay mail we can create a new Receive Connector on the Hub Transport server. 220 Microsoft ESMTP MAIL Service ready at Wed, 18 Au However if I try to relay out to an external recipient, the Exchange server does not allow it.
But with Anonymous Users enabled on the Receive Connector I can send from an address to a valid local address. You’ll note that relay is denied if I try to send from an address to an address, because neither is a valid domain for the Exchange organization. In those cases relay would still be denied but will behave differently than the first example. Mail from: 5.7.1 Client was not authenticatedįor some Hub Transport servers that are internet-facing, anonymous connections may already be enabled. 220 Microsoft ESMTP MAIL Service ready at Wed, 18 AuĢ50 Hello You can see this in effect if you telnet to the server on port 25 and try to initiate unauthenticated SMTP communications. However, this connector is secured by default to not allow anonymous connections (ie, the type of connection most non-Exchange systems will be making). The transport service listens for SMTP connections on it’s default Receive Connector. SMTP communication is handled by the Hub Transport server in an Exchange organization.
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This is common with multi-function devices such as network attached printer/scanners, or applications such as backup software that send email reports. In most Exchange Server 2010 environments there will be the need to allow relaying for certain hosts, devices or applications to send email via the Exchange server.
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