Step 1Find and click Settings on your iDevice.

iPhone home screenStep 2Scroll down and select Mail, Contacts, Calendars.

Settings menuStep 3Select Add Account...

Mail, Contacts, Calendars screenStep 4Scroll down and select Other.

Add account screenStep 5Select Add Mail Account.

Other mail account screenStep 6Enter the name you wish to display to others when sending mail, your full e-mail address, and the password for the e-mail account. The description will mirror the e-mail address by default, although you may change it to whatever you like.

New account screenStep 7Tap the Next button.
New account screenStep 8Ensure that IMAP is selected at the top and that the name, address and description have been carried over.Scroll down and enter imap.1and1.com in the Host Name field and your full E-mail Addressin the User Name field under the Incoming Mail Server section.
New account screenStep 9Enter smtp.1and1.com in the Host Name field and your full E-mail address in the User Name field under the Outgoing Mail Server section. Enter the Password for the E-mail account.
New account screenStep 10Tap the Next button.

New account screenStep 11Turn Mail syncing ON. Optionally, you may also turn on Notes syncing.

Sync with IMAPStep 12Click Save to complete the setup of your 1&1 Mail Basic account on your iPhone.

Accounts overviewYour 1&1 e-mail account is now connected to your iPhone and you can access it at anytime.