If you are using self hosted WordPress blog and you are not familiar with how to stop spam comments you will be getting daily hundreds of spam comments in your spam box. When my blog started to get visitors I also started to get daily hundreds of spam comments.
Most of spam comments are not human generated but these comments are generated by spam bots. These spam bots are some programs that are designed to spread spam easily. Most of spam comments are for buying online Viagra, Cialis and sex tapes of celebrities etc.
Akismet is a great spam detector plugin so it can easily identify spam comments but it is not for preventing spam. But to good there are some spam blocker plugins that can help you to stop spam comments.
I have discussed some of the plugins in this post but not tested all of them.
WP-Hashcash
I was getting irritated by hourly spam comments. But now I am really relaxed. To block spam I am using WP-Hashcash. I have only tested this plugin and it 99% effective. It is unable to stop human generated spam but it is 100% effective for spam bots. It works with Akismet also. It gives you three option after installing it, it can put comment in moderation, Akismet queue or deletion mode, I have selected third option. One more good this about WP-Hashcash is that it works with comments systems like intense debate and Disqus, it works with contact form also so you will not get spam emails in your inbox from your contact page or advertise page forms.
AVH First Defense Against Spam
This plugin also seems good; to use this plugin you need an API key from stopforumspam.com. Spammers can be blocked by the information supplied about the third-party. It can block the spammer before the content is served.
Spam Free
This is simple plugin to stop spam; normal visitors will not know you are using a spam blocking plugin.
WP-SpamFree Anti-Spam
This plugin also work to block spam in comments and in contact forms. It prevents trackback and pingback spam. This plugin has good ratings and reviews.
SI CAPTCHA Anti-Spam
Most of anti-spam plugins promote them saying block spam without CAPTCHA, and they are right, but everyone has its own favorite so many bloggers still using CAPTCHA to block spam. No doubt it annoying for normal reader who wants to leave a comment but it is effective for bots.
Math Comment Spam Protection
This plugin will ask simple mathematical question to user, many blogger use this plugin, this plugin is not updated since long but it works with new versions.
NoSpamNX
This plugin does not need any JavaScript or cookies or sessions to work, it does not change any of your comment template fields. But it adds some invisible form fields to your comment form.
Bad Behavior
Bad Behavior is sure uses very different method to prevent spam. It prevents link spam and robots. It acts as a gatekeeper and it is a PHP based solution.
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{ 3 comments… read them below or add one }
spam blockers are really needed these days because you will always get spam from e-mails and on your facebook account too.:~`
spam blockers are always necessary because there are so many spam these days .:.
Anti spam plugins are really needed in blogs and most of time, blog owners use Akismet. However in my experience, G.A.S.P is way better since there are a lot of comments that are mistakenly caught as SPAM by Akismet.