Martin Lormes

<p><em>Block Top Spammers</em> displays a list of your top spammers’ IP addresses, based on all comments in your database that are marked as spam. It also generates a blacklist for your <code>.htaccess</code> file to block those spammers from your website entirely, thus taking load off the server. – You will need another plugin (like <a href="http://akismet.com/" rel="nofollow ugc">Akismet</a>) to identify the spam.</p>
<p>PHP 5 and Apache required.</p>
<h3>Roadmap</h3>
<h4>0.6 (April 2010)</h4>
<ul>
<li>edit blacklist (i.e. remove individual addresses, manually add addresses and/or subnets)</li>
<li>manually override .htaccess location</li>
<li>customize 403 error shown to blocked spammers</li>
</ul>
<h4>1.0 (May 2010)</h4>
<ul>
<li>Multi-Site support (WordPress 3.0, maybe WPMU 2.8/2.9)</li>
</ul>


Block Top Spammers

Block Top Spammers displays a list of your top spammers' IP addresses. It also generates a blacklist for your .htaccess file.

jamiechong

<p>A lot of registration spam comes from emails with a subdomain. Spammers control a domain such as buymyjunk.com and then attempt to register on your site with emails such as irenemwd@foster2.buymyjunk.com and jakemgm@foster7.buymyjunk.com. This plugin simply blocks all registrations using a subdomain.</p>
<p>Reputable users will have a normal email address from a reasonable domain like @gmail.com, @mylegitbusiness.com, @outlook.com, @myschool.edu, etc.</p>
<p>There is no configuration and no setup. It simply just works. The plugin logs all blocked registrations so you can find potential false-positives. Find a link to this log file on the Plugins page where you activate/deactivate this plugin.</p>


Ban Subdomain Emails

Prevent people from registering with emails that contain a subdomain to help reduce spam.

Block Top Spammers vs Ban Subdomain Emails