Yes, Akismet can be of huge help when fighting with comment spam, but it can’t help against the most sophisticated auto-commenting tools which make fake comments look very real.

These software have one thing in common though, a flaw which they share. They try to automatically post the comment data (name, email, URL, text) to the wp-comments-post.php file on your blog, which WordPress allows by default. There is a simple solution to avoid this and it’s htaccess.

Just paste this code below any existing content in your own .htaccess file at your WordPress installation:

RewriteEngine On RewriteCond %{REQUEST_METHOD} POST RewriteCond %{REQUEST_URI} .wp-comments-post.php* RewriteCond %{HTTP_REFERER} !.ephp.info. [OR] RewriteCond %{HTTP_USER_AGENT} ^$ RewriteRule (.*) ^http://%{REMOTE_ADDR}/$ [R=301,L]

Replace ephp.info with your own domain name in the above code, though.

This should lower the work required by Akismet.

[by WpRecipes]