33Mail is an email privacy service that helps people protect their primary email address when signing up for websites, newsletters, and other online services. Users can create unlimited private email aliases under a personal 33mail domain and use a different address for each service. Messages sent to an alias are forwarded to the user’s existing email account, so there is no need to check a separate inbox. If an alias begins receiving unwanted messages, users can block it, preventing further mail from reaching them. 33Mail also supports anonymous replies to forwarded emails, adding another layer of separation between users and senders.

The service offers a free basic plan with a generous bandwidth limit. A paid premium subscription is available for people who want additional features, including the option to choose their own domain and higher daily bandwidth and reply limits. 33Mail provides account management and support resources through its website, including help pages, FAQs, contact information, and a blog.