I'm perplexed by why this plug-in encodes certain addresses but completely skips others. For instance, it converts this test code:
name@gmail.com
<a href="mailto:me@name.com">me@name.com</a>
to this:
name@gmail.com
<span id="hkmuob-id-1971" class="hkmuob_noscript">me@name.com (me<span class="HkMuob_display"> null</span>@<span class="HkMuob_display">null </span>name<span class="HkMuob_display"> NULL</span>.com)</span>
Huh? Only one of the three occurrences of an email addresses was actually modified.
http://wordpress.org/extend/plugins/hikari-email-url-obfuscator/