Wagner

<ul>
<li>Block certain kinds of users from registering to your WordPress site by adding blacklist rules. </li>
<li>Super simple to use. The whole plugin just has one simple settings page.</li>
<li>Support regular expression rules.</li>
<li>Completely free.</li>
<li>Support tracking and recording login attempts since v1.1.0.</li>
<li>Login attempts chart since v1.1.0.</li>
</ul>


Geek Mail Blacklist

Block users with certain emails from registering to your WordPress site by adding blacklist rules.

proninyaroslav

<p>Adds IP from comment that marked as spam to standard WordPress blacklist. Comments already marked as spam are not added to the list.</p>


Spam to blacklist

Adds IP from comment that marked as spam to standard WordPress blacklist.

Geek Mail Blacklist vs Spam to blacklist