11 Mail is a free Android application developed by 11 Telecom GmbH. It falls under the category of Social & Communication and is optimized for 1&1 Mail. With 11 Mail, you can easily access your 1&1 mailbox from anywhere on your mobile device.

This app is specifically designed for users who have internet contracts with 1&1. It offers mobile access to your 1&1 mailbox and allows you to manage your emails on the go. The app has an easy-to-use interface that makes it simple to navigate and handle your emails efficiently. However, it is not compatible with contracts from IONOS by 1&1.

Overall, 11 Mail is a great app for 1&1 users who want to stay connected to their mailbox while on the move. With its optimized features, it offers a hassle-free way to manage your emails on your mobile device.