$.ajax({
url: 'index.php?route=<ваш путь>',
type: 'post',
data: {
email: $('input[name="email"]').val()
},
success: function () {
console.log('збс!');
}
});
if ($this->request->server['REQUEST_METHOD'] == 'POST') {
echo $this->request->post['email']; // содержит значение input[name="email"]
}