lelandf

Stop Signup Spam will prevent user registration of anyone trying to sign up with an the email address or IP address that has been reported to <a href="http://stopforumspam.com/" rel="nofollow ugc">Stop Forum Spam</a>.
Contrary to what the name implies, Stop Forum Spam can be used with any web service, not just forums.
At this time, Stop Signup Spam integrates with:
<ul>
<li>The core WordPress registration form</li>
<li>Restrict Content Pro</li>
<li>MemberPress</li>
<li>Give</li>
</ul>
By installing this plugin, you consent to an API call sent from your WordPress site to Stop Forum Spam after every attempted user registration. The API call includes the user’s email address and IP address.
It is a similar concept to <a href="https://wordpress.org/plugins/akismet/" rel="ugc">Akismet</a>, except instead of checking for blog comment spam, it checks for user signup spam.
Unlike Akismet, no API key is required to query Stop Forum Spam’s database. Partly because of this, I decided not to include a settings page in the Stop Signup Spam plugin. Just activate and you are all set.
The plugin does not log any user registration info. Any data sent to Stop Forum Spam would fall under their <a href="https://www.stopforumspam.com/privacy" rel="nofollow ugc">privacy policy</a>.
Please note that Stop Forum Spam is a third-party service that I have no affiliation with. I just found it, could not find any existing WordPress plugins that worked with it, and built one myself.
It has helped me cut down on signup spam on a free membership site that I run, and I hope it will help you do the same.

Stop Signup Spam

Check user registration info against the Stop Forum Spam database before allowing registration

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.

Stop Signup Spam vs Email Address Encoder