Overview:

Follow the steps below to redirect your site on 1and1.

Steps:

1. Go to 1and1 and login
2. In your control panel, click the Hosting tab at the top
   
3. Find the website you want to add the redirect script to, then click Edit Website
   
4. In the 1and1 website editor, look at the right sidebar and click Settings
   
5. In the pop-up menu, click Edit Header.
   
6. Paste the redirect code into the header box. Click Save. It's as easy as 1.2...5!
   

​​Other Resources:

You might be looking to setup your custom domain with 1and1, please click here to see instructions on how to set this up. Set up a CNAME record with 1and1