Wordpress has a cool feature that allows you to create shortcodes to put in your posts like [bartag foo="foo-value"] and then process it using a PHP function.   Go to the codex page and check it out, it’s pretty straight forward.  Next go grab you a copy of CodeIgniter, crack it open and go to system/helpers/url_helper.php.  Snatch the safe_mailto() function and paste it in your code.  I put mine in the functions page in the theme for quickness but you can put it in a plug in if your up for all that.  Now underneath the CI function ,  write you a function that takes the attributes and content from the shortcode and then call the safe_mailto() function.  You should end up with something like below. That’s it! Now you can have protected and obfuscated email links in your posts!

//The CodeIgniter function
if ( ! function_exists('safe_mailto'))
{
	function safe_mailto($email, $title = '', $attributes = '')
	{
		// The actual function. You get the drift...
	}
}

// The function to process the shortcode
function maillink_func($atts, $content = null) {
	extract(shortcode_atts(array(
		'email' => get_bloginfo ( 'admin_email' ),
                'title' => null,
                'class' => null,
                'id'    => null,
                'style' => null
                //add more attributes if you want them, but add below too!
	), $atts));

        return safe_mailto($email, $content, array(
                'class' => $class,
                'id' => $id,
                'style' => $style
            ));
}

//Register the shortcode with Wordpress
add_shortcode('maillink', 'maillink_func');

// Usage
// [maillink email="someone@somewhere.com"]
// [maillink email="someone@somewhere.com" class="link"]Email Me![/maillink]