Mail.com is a web portal and web-based email service provider owned by the German internet company United Internet. It offers news articles and videos and a free webmail application with unlimited storage.

Mail.com offers a free, advertising-supported email service with unlimited storage for emails, choice of over 200 domains, online file storage, collecting of emails from other accounts (which is now a paid for service), organizer, Facebook integration, and spam and virus protection.

On its homepage, mail.com features sponsored news, blog posts and browser games. It also provides a search engine, which is enhanced by Google.

mail.com is one of the last remaining major email providers that does not require a personal phone number to set up an inbox, allowing access to users who do not have or do not wish to provide a phone number to a third party to use email. This allows greater privacy, but prevents users from enabling two-factor authentication (2FA), a form of multi-factor authentication.