One the best Plugins for WordPress websites is Anti-Spam by Clean Talk. I have used this great plugin on two WordPress sites for two years. SInce inception Clean Talk has prevented over 980 spam comments from posting on my site. This is an enormous achievement. If not for Clean Talk I would have to manually remove comments every day to prevent my site from clogging up with spam messages. I highly recommend Anti Spam by Clean Talk for use on your website. Clean Talk WordPress site