The people who run Aardvark, the mailing list I have been using for some years, announced a few days ago that they are closing down. In fact, it looks like they have already done so. They recommend several alternatives, and I have opted for a free one called Mail Chimp. To sign up to receive notifications of updates on the site, go to the front page; in the box at top right you'll see "Subscribe to Movie Updates Notification". Click on that and fill in the form. The only required field is an e-mail address.
I don't know if Mail Chimp will allow notifications for adult websites (I didn't wade through their terms and conditions of use but almost everyone forbids adult material), so this arrangement may not last very long. The most reliable way to learn of updates is to sign up on my Clips4Sale mailing list - if you have ever purchased a clip via them you should have been presented with this option.