By,
Pragati
On most websites there are some kinds of forms that require the
submission of data. Be it the simple contact form or the commenting
functionality for blog entries or other content types. If so you will
need a way to protect these forms from spam.
The key module to do so is the Drupal CAPTCHA module. The purpose of
CAPTCHA is to block form submissions by spambots, which are automated
scripts that post spam content everywhere they can.To Read More...Click Here
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