Which feature should be configured to track a donor's response to a direct mail campaign?

To effectively track a donor's response to a direct mail campaign, configuring Automatic Campaign Member Management is essential. This feature streamlines the process of adding and managing campaign members, allowing you to record responses such as donations or engagement after receiving the direct mail.

When a donor interacts with the campaign, their response can be automatically tracked and linked to their record, which facilitates better analysis of the campaign's effectiveness and helps to identify which donors are most responsive. This automation not only saves time but also ensures that all interactions are accurately captured for reporting purposes.

In contrast, other options like Customizable Rollups or Customizable Campaign Influence focus on different aspects of data management and analytics rather than direct tracking of individual responses. A Sales Process typically pertains to the management of sales activities and doesn't directly apply to tracking responses in a fundraising context. Thus, Automatic Campaign Member Management is the most pertinent feature for monitoring donor interactions specifically related to direct mail campaigns.