Editor's Review
If your inbox lives on a 1&1 address, the provider's own app is the path of least resistance. There is no server setup to get wrong: sign in with the same credentials you use on the web and the mailbox, contacts and calendar arrive already configured.
What you get: a threaded inbox with push notification, swipe actions for delete and move, search across folders, and spam filtering that runs on 1&1's side rather than on the handset. The calendar and address book sync from the same account, and files kept in 1&1 cloud storage can be attached without leaving the compose screen.
Where it falls short: this is a single-provider client. It is built around 1&1 accounts, so anyone trying to gather Gmail, Outlook and a work address into one place will be better served by a general-purpose mail app. The interface is conservative too — clearly laid out and quick, but without the gesture customisation or smart sorting that the bigger third-party clients have spent years refining.
For a subscriber who simply wants their mail to work, that is usually an acceptable trade, and the 4.5 store average suggests most users see it the same way.
Features
Automatic setup for 1&1 mailboxes using your existing login
Push notification for new messages
Calendar and contact sync tied to the same account
Attach files straight from 1&1 cloud storage
Server-side spam filtering and folder-wide search
Pros
No manual IMAP or server configuration to get wrong
Mail, calendar and contacts all hang off one login
Backed by a telecoms provider rather than an ad-funded free service
Cons
Handles 1&1 accounts only, so it cannot replace a multi-account client
Plainer than established third-party mail apps
Questions people ask
Can I add a Gmail or Outlook account?
The app is built for 1&1 mailboxes. If you need several providers landing in one inbox, a general mail client is the better fit.
Do I need a 1&1 subscription?
You sign in with an existing 1&1 email account. Without one there is nothing for the app to connect to.
