Dustin Filippini

This plugin will add a shortcode that can be used to stop spambots from harvesting emails entered into your WordPress editor while creating pages or posts.
To use, just wrap your email address in the [email] shortcode:
[email]you@yourdomain.com[/email]
The result will be a hyperlinked email address that can be clicked on to send email.
The plugin uses WordPress’s built-in antispambot() function which converts email address characters to HTML entities which are not read by spambots, but can be viewed properly in the browser. For more info on the WordPress function read up in the Codex – https://codex.wordpress.org/Function_Reference/antispambot

WP-AntiSpambot

Adds a shortcode which converts email addresses to HTML entities to block spambots.

Ralf Weber

No more SPAM by spiders scanning your site for email addresses. With CryptX you can hide all your email addresses, with and without a mailto-link, by converting them using javascript or UNICODE.
CryptX protects your email addresses from spambots while keeping them readable and functional for your visitors. The plugin automatically detects email addresses in your content and encrypts them using various methods including JavaScript encryption, Unicode conversion, and image replacement.
Key Features:
<ul>
<li>Automatic Email Detection – Finds and encrypts email addresses in posts, pages, comments, and widgets</li>
<li>Multiple Encryption Methods – JavaScript, Unicode, image replacement, and custom text options</li>
<li>Widget Support – Works with text widgets and other widget content</li>
<li>RSS Feed Control – Option to disable encryption in RSS feeds</li>
<li>Whitelist Support – Exclude specific domains from encryption</li>
<li>Per-Post Control – Enable/disable encryption on individual posts and pages</li>
<li>Shortcode Support – Use <code>[cryptx]email@example.com[/cryptx]</code> for manual encryption</li>
<li>Template Functions – Developer-friendly functions for theme integration</li>
</ul>
<a href="http://weber-nrw.de/wordpress/cryptx/" title="Plugin Homepage" rel="nofollow ugc">Plugin Homepage</a>

CryptX

No more SPAM by spiders scanning your site for email addresses!

WP-AntiSpambot vs CryptX