E-mail sender reputation requires a server that has an outbound connection to the Internet.
See Configure TA-SMTP-Reputation learn how to configure the add-on for the version of Windows Server that your Exchange Server SMTP-Reputation Server host runs prior to deploying it to Exchange Server hosts.
The add-on includes the following data inputs:
Data inputs for Linux and Windows OS:
Overview of TA-SMTP-Reputation
This documentation applies to the following versions of Splunk® App for Microsoft Exchange: 3.5.2, 4.0.0, 4.0.1