arminschaeffer

This plugin serves as spam-filter for your contact forms powered by machine learning.
It shows the following advantages over other spam prevention methods:
<ul>
<li>It does not hinder your users, the spam detection runs totally in the background (in contrast to captchas or verification questionaries).</li>
<li>It does not send the form data to third parties for spam detection. The detection is executed on your server.</li>
</ul>
<h3>Supported Forms Plugins</h3>
At the moment, the following form plugins are supported:
<ul>
<li>Contact Form 7</li>
<li>Formidable</li>
</ul>
<h3>Supported Languages</h3>
At the moment, only english spam mails can be detected.
Normally, only english spam messages should be filtered, but due to the increasing use of english vocabulary in other languages, sometimes messages with other languages could be filtered out too, please keep this in mind.

Wp SpamAinator

This plugin serves as spam-filter for your contact forms powered by machine learning.

Till Krüss

A lightweight plugin that protects plain email addresses and mailto links from email-harvesting robots, by encoding them into decimal and hexadecimal entities. Has an effect on the posts, pages, comments, excerpts, text widgets and other filtered content. Works without JavaScript — just simple spam protection.
To see whether all your email addresses are properly protected, use the free <a href="https://encoder.till.im/scanner?utm_source=wp-plugin&utm_medium=readme" rel="nofollow ugc">page scanner</a> tool.
Other content (like phone numbers) can be protected using <code>[encode]</code> shortcode:
<pre><code>[encode]+1 (555) 123-4567[/encode]
[encode link="tel:+15551234567"]+1 (555) 123-4567[/encode]
</code></pre>
<h4>Premium Features</h4>
<ul>
<li>Full-page protection that catches all email addresses</li>
<li>Hardened protection using JavaScript and CSS techniques</li>
<li>Improved phone number protection</li>
<li>Built-in plugin support for ACF, Jetpack, WooCommerce and many others</li>
</ul>
Check out the <a href="https://encoder.till.im/download?utm_source=wp-plugin&utm_medium=readme" rel="nofollow ugc">Premium</a> version of Email Address Encoder.
<a href="http://coderisk.com/wp/plugin/email-address-encoder/RIPS-r0bJqKvBws" rel="nofollow ugc"></a>

Email Address Encoder


This might work with page or post content, but does not with widgets. I can't recommend using this and suggest to use the plugin "Email Encoder" by Jannis Thuemming instead, since that does the job out of the box.


Not working with widgets

A lightweight plugin that protects email addresses from email-harvesting robots, by encoding them into decimal and hexadecimal entities.

Wp SpamAinator vs Email Address Encoder