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Drupal 7 Webform Cookbook by Douglas Vernon Denny

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Preventing spam with CAPTCHA

We do not live in an ideal world. There are folks out there who write automated software, called spambots, that surf the Internet to cause mischief. It is not unheard of, for example, for an online form to receive 300 submissions in the space of a few minutes from one of these malicious bits of automated software.

The Drupal community provides a selection of contributed modules to help us deal with potential spammers. The Mollom project (http://drupal.org/project/mollom) is perhaps the most comprehensive of these utility modules. The Mollom project is actively maintained by, among others, the creator of Drupal, Dries Buytaert. At a more basic level of protection, we have the options of the CAPTCHA (http://drupal.org/project/captcha ...

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