WP Comment Spam Blocker Plugin
Documentation : http://kingpabel.com/documentation-comment-spam/
WP comment spam blocker is very easy to use,there has nothing to customize.To install this plugin first login in wp-admin in your wordpress project.Then go to Plugin->add new and then upload this plugin.After complete uploading just active this plugin.
Your work is done.From now no one can’t do any comment spamming in your wordpress project.