Exchange Anti-Spam Toolkit provides additional anti-spam filtering capabilities to Exchange Server and also provides a graphical user interface for managing all built-in anti-spam capabilities in Exchange. Two new types of message filters are provided:
- A URL or Domain-based Blocklist filter (also known as URI DNSBL or SURBL filter)
- A Sender Score filter, which allows messages to be scored using a DNS-based scoring service (such as Return Path Sender score), and optionally rejected if a minimum score is not met
Managing the built-in anti-spam functionality in Exchange 2019, 2016 and 2013 can be complex as it must be done using PowerShell. Exchange versions from 2013 onwards lack a graphical user interface for managing almost all anti-spam functionality. Exchange Anti-Spam Toolkit provides this missing functionality with a comprehensive web-based interface.
The additional filtering capabilities are provided by custom Transport Agents. Usage of these filters is optional and is easily configurable with the web interface. If you choose to use the additional filters, Exchange Anti-Spam Toolkit must be installed all Exchange servers in your organization (or on all Edge Transport servers, if your Exchange environment has Edge Transport servers).
The graphical interface is provided through a web interface hosted in Internet Information Services. It functions in a similar way to the built in Outlook Web App and Exchange Management Console. The simplest and recommended configuration is to install and license Exchange Anti-Spam Toolkit on each Exchange Server in your organization. Anti-spam settings which are organization-specific can be managed from any Exchange Server. Settings which are server-specific, such as Transport Agents, are managed individually by accessing the Exchange Anti-Spam Toolkit web console on the appropriate Exchange Server.