Support for Drupal 7 is ending on 5 January 2025—it’s time to migrate to Drupal 10! Learn about the many benefits of Drupal 10 and find migration tools in our resource center.
The Hashcash module implements the Hashcash algorithm, which was originally created as a means of preventing spam emails.
Installing this module is all that needs to be done to help prevent spam form submissions from robot scripts. There is limited configuration, although it will work perfectly out of the box.