kennethrapp

This is a basic emailer and shortcode, designed to display a mail form for a contact page. It will post a 
plaintext email to a provided email address.
<h3>Shortcode</h3>
The shortcode generated for your account will look like 
‘[plainmail header=”a header” mailto=”your_account_name”](introductory text)[/plainmail]’.
Place that shortcode into a page to generate an email form for the email you associated with that account. Between the [plainmail][/plainmail] tags you can put some introductory text for the form. Note that anything 
here will be escaped, so html will not render.
<h3>Administration</h3>
When a message is sent to you, you will see the email headers appear in the settings area. The body of the message itself is not saved. Headers are set by default to auto-delete after 24 hours but you can also delete headers manually. Only up to 
50 headers will be displayed.

WordPress Plain Mail

Display an email form and send plaintext emails through a shortcode.

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.

WordPress Plain Mail vs Email Address Encoder