$(document).ready(function () {
    var regex = /([a-z]+)\s+\[(?:apenstaartje|at)\]\s+([a-z]+)\s+\[(?:punt|dot)\]\s+([a-z]+)/g;
    var matches = $.find('.email');
    
    $(matches).each(function (i, node) {
        node = $(node);
        var oldText = node.text();
        var newText = oldText.replace(regex, '<a href=\"mailto:$1\@$2.$3\">$1\@$2.$3</a>');
        // console.log(newText);
        node.html(newText);
    });
});