Akismet checks your comments against the Akismet Web service to see if they look like spam or not and lets you review the spam it catches under your blog's "Comments" admin screen.
Major features in Akismet include:
PS: You'll need an Akismet.com API key to use it. Keys are free for personal blogs; paid subscriptions are available for businesses and commercial sites.
Here is the Akismet wordpress plugin download link you can download and install to your Wordpress blog
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