Andrew Ensley

This plugin automatically scatters invisible links to <a href="http://www.projecthoneypot.org/" rel="nofollow ugc">Project Honey Pot</a> spam traps 
throughout your wordpress blog to help catch and stop spammers.
Project Honey Pot is the first and only distributed system for identifying spammers and the spambots they use 
to scrape addresses from your website. Using the Project Honey Pot system you can install addresses that are 
custom-tagged to the time and IP address of a visitor to your site. If one of these addresses begins receiving 
email Project Honey Pot not only can tell that the messages are spam, but also the exact moment when the address 
was harvested and the IP address that gathered it.
Install this plugin to help contribute to the project and catch spammers by hiding links to honey pots (spam traps) 
in your blog. The links are never visible to human visitors, but the spambots and crawlers follow them straight into 
the traps.
Note: this plugin will not directly prevent spam on your site, but will help prevent spam for everyone by helping to catch the spammers.
If you also want to use the Project Honey Pot API to detect and block spammers from your site, try the <a href="https://wordpress.org/extend/plugins/httpbl/" rel="ugc">http:BL plugin</a>.
<h3>Features</h3>
<ul>
<li>Outputs randomly generated invisible links to honey pots in order to catch spambots</li>
<li>Specify a locally installed honey pot, a quick link to someone else’s honey pot, or both</li>
<li>Check if the current visitor is listed in Project Honey Pot’s <a href="http://www.projecthoneypot.org/services_overview.php" rel="nofollow ugc">HTTP:BlackList</a></li>
<li>Output links to all visitors or just those listed in the HTTP:BL</li>
<li>Fully customize each location in which links are inserted</li>
</ul>
<h3>License</h3>
This plugin is released under the <a href="http://www.gnu.org/licenses/gpl-3.0.html" rel="nofollow ugc">GPLv3</a> license and comes with ABSOLUTELY NO WARRANTY, to the extent permitted by applicable law. I make no guarantee this plugin will work for you.
<h3>Support</h3>
For support, please visit the <a href="http://andrewensley.com/projects/project-honey-pot-wordpress-plugin/" rel="nofollow ugc">plugin page</a>

Project Honey Pot Spam Trap

Automatically scatters invisible links to Project Honey Pot spam traps throughout your wordpress blog to help catch and stop spammers.

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.

Project Honey Pot Spam Trap vs Email Address Encoder