This shortcodes for WordPress hides email addresses from spam bot.

wp-antispambot.php

<?php
/**
 * Hides email addresses from spam bot.
 *
 * @param array $atts {
 *    The various options. The only required is "address".
 *
 *    @type string  $type    The type of protocol to be used.
 *                           Default: 'email'.
 *                           Accepts: 'email', 'jabber'.
 *    @type string  $address The address to be used (required).
 *    @type string  $class   The CSS class for the HTML element.
 *    @type string  $subject The default subject for the email when the user clicks on the link.
 *    @type string  $text    The text to be linked with the email/Jabber address.
 *    #type boolean $link    If the HTML element should be a link or a span element.
 * }
 * @example [email address="[email protected]"]
 * @return string The formatted HTML email link or span.
 */
function ubnsc_email( $atts ) {
	extract( shortcode_atts( array(
		'type'    => 'email',
		'address' => '',
		'class'   => '',
		'subject' => '',
		'text'    => '',
        'link'    => 1
	), $atts ) );

	switch ( $type ) {
		case 'email'  : $protocol = 'mailto:'; break;
		case 'jabber' : $protocol = 'xmpp:';   break;
	}

    $address = sanitize_email( $address );

	if ( $class ) $class = ' class="' . sanitize_html_class( esc_attr( $class ) ) . '"';

	if ( $subject ) $subject = '?subject=' . esc_attr( $subject );

    /*
       Do not escape the last $text variable because it can contain an HTML image:
       $text = empty( $text ) ? $text = antispambot( $address ) : esc_html( $text );
    */
    $text = empty( $text ) ? $text = antispambot( $address ) : $text;

    if ( 1 == $link ) {
        $output = '<a' . $class . ' href="' . $protocol . antispambot( $address, 1 ) . $subject . '">' . $text . '</a>';
    } else {
        $output = '<span' . $class . '>' . $text . '</span>';
    }

	return $output;
}
add_shortcode('email', 'ubnsc_email');