Webform Usermail Validation

This simple sandobox module adds an extra validation to the Webform Validation page, allowing you to check if a user e-mail entered on a webform field already exists on your database.

Setup:

Enable the module and the “Must match a user e-mail” validation will appear on the Webform Validation page.

Dependencies:

  • Webform
  • Webform Validation
  • Chaos tools
  • Views


Source: https://drupal.org/project/project_module/feed/all