第一种
<!--email_off--> 这里输出你的邮箱 <!--/email_off-->
网上还有一种(PHP)解法
<?php
function deCFEmail($encode){
$k = hexdec(substr($encode,0,2));
for($i=2, $m=''; $i < strlen($encode) - 1; $i += 2){
$m.=chr(hexdec(substr($encode, $i, 2))^$k);
}
return $m;
}
echo deCFEmail("db93b4a9a9b5a2f5baa8bdaeb8b09bbcb6bab2b7f5b8b4b6")."\n";
?>