1. In your account, go to My Domains > Manage my domains
2. Select the domain to redirect
3. Click on Edit the URL Forwarding
4. Click on Activate URL Forwarding
5. Type the URL where you want to be redirected
6. In the field Into a frame, select 'no' to display the final url and select 'yes' to display the initial url
7. Click on Confirm Your Details
It will take up to 1-2 hours for your forwarding to take effect.
Note: this option is only available if the name servers of the domain are EuroDNS' ones (ns1.eurodns.com / ns2.eurodns.com)