buntegiraffe

Hide Email Address allows you to make email addresses on your site invisible to web spiders and crawlers. 
It also makes it still possible to easily copy and paste email addresses.
Please feel free to post your questions in the support threads of this plugin, we will be glad to help you with any issues.
PRO Version: 
Automatically protects all email addresses on your site, for only 4.95 eur with Hide Email Address PRO (http://bunte-giraffe.de “http://bunte-giraffe.de”).
<blockquote>
<h4>Main features</h4>
<ul>
<li>Hide email addresses from bots</li>
<li>Hide single-line sensitive content from bots</li>
<li>Protected content is generated as image </li>
<li>Protected content is turned into text on click (for real visitors to copy)</li>
<li>Protected content uses the styles of your posts/pages/widgets </li>
<li>Automaticaly protects all emails on your site (PRO version)</li>
<li>Regular updates</li>
<li>Great support</li>
</ul>
</blockquote>

Hide Email Address

Looks good so far

Protect email address from being collected by web crawlers.

dubhunter

Spam is one of the most frustrating things about the internet. 
And, even more frustrating is how spiders scrape blogs and other sites for email addresses to spam. 
Wouldn’t it be nice if you could put mailto links just how you were taught, without fear of spiders? 
Well now you can! With this plugin, all mailto links will be filtered on display and converted to their unicode counterparts.

DBD Mailto Encoder

Spam is one of the most frustrating things about the internet.

Hide Email Address vs DBD Mailto Encoder