When transferring a domain that already has an existing website and E-mails system, it is important to ensure a minimum amount of downtime. While it is not possible to completely remove downtime from the transfer process, you can refer to the following steps to reduce it.
Order the domain you have registered externally as an external domain in the 1&1 Control Panel
Point your domain to 1&1 Name Servers
. During this process you will be given the 1&1 DNS settings for the external domain. Please write them down.
Upload your website to your new web space using the email@example.com included in your package as a hostname and your FTP details found in the 1&1 Control Panel
Now point the external domain to the folder where you have uploaded your website.
Create any E-mail addresses you have with your other provider for your domain e.g. firstname.lastname@example.org in the 1&1 Control Panel under Email as mailbox accounts.
Configure your E-mail client to use the E-mail addresses you have setup.
Contact your current provider and ask for your domain's DNS settings to be changed to the DNS settings you were given under Step 2.
Your website and E-mail will be switched to 1&1 Name Servers within 48 hours