How to Configure a Relay Connector for Exchange Server 2013

Lets see how to create a relay connector (Anonymous relay) in Exchange 2013.

What is relay in simple terms –

Email relaying is using an email server to send email that did not originate on the
email server.

Most Commonly used for fax servers, CRM , Email Routing from different forests etc..

Step 1 –

Login to Exchange Control Panel . https://servername/ecp

Step 2 –

Its highly recommended not to touch the default connectors . Or Create any connector on the Hub Transport role

Choose the + Sign

Step 3 –

Enter a Friendly Name , Choose the role “Front End Transport”

Choose Type Custom

Frequent Exchange Admin Mistakes –

https://www.azure365pro.com/exchange-2013-transport-service-is-not-starting1067-error/

Step 4 –

Leave this part Unchanged ,

Step 5 –

Take off the full range , Assign the application IP which needs access to relay through this mail server.

Click Finish and get the connector Created

Step 6 –

Now open the properties of connector – (Just double click on it )

Or Use Powershell –

New-ReceiveConnector -Name "Relay" -RemoteIPRanges ("10.128.57.2","10.128.57.3") -TransportRole "FrontendTransport"  -Bindings ("0.0.0.0:25") -Usage "Custom" -Server "Exch2013A.azure365pro.com"

Set-ReceiveConnector -Identity "Servername\Relay" -PermissionGroups "AnonymousUsers"

Step 7 –

To Complete this task . you got to allow to accept anonymous connections in the connector.

One Exchange Management Shell – Run

Get-ReceiveConnector "Relay Connector Name" | Add-ADPermission -User "NT AUTHORITY\ANONYMOUS LOGON" -ExtendedRights "Ms-Exch-SMTP-Accept-Any-Recipient"

For Example –

Get-ReceiveConnector "ServerName\RelayConnectorname" | Add-ADPermission -User "NT AUTHORITY\ANONYMOUS LOGON" -ExtendedRights "Ms-Exch-SMTP-Accept-Any-Recipient"

Now that Application will be able to relay through Exchange 2013 with ease.