The newsletters are sent every month, they gather the last selections of the site classified by domains. Newsletters archives are accessible on the homepage below the newsletter subscription (column on the right). You can subscribe to newsletters on the homepage.
To unsubscribe it is imperative to use the unsubscribe link at the bottom of each newsletter.
If you have created a portfolio, you will automatically receive the selections newsletter. This will contain a summary at the bottom of the page, to access your account.