This tip is pretty easy to use. Just use the antispambot() function anywhere in your theme templates:
<?php antispambot('[email protected]',1 ) ?>
But what if you need to type email adresses in WP editor? No problem, I have a shortcode for that! Just have a look on CatsWhoCode.com.
Credits: WordPress Codex
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How to automatically obfuscate email adresses on your WordPress blog