You can add additional 1&1 Mail Business users anytime you like.
Log in to your 1&1 Control Panel
and select the relevant package.
Click the 1&1 Mail Business Settings
link from the Mail
1&1 Mail Business Settings
from the 1&1 Mail Business Overview page.
If you have set up all of your 1&1 Mail Business accounts already, you will have to purchase an additional one. Click on Additional 1&1 Mail Business Users
In the customer shop, select the 1&1 Mail Business 4.0 order box and enter the amount of additional users you'd like to order. The price for each account will be listed in the box. When finished, click Choose.
An Overview of your basket is displayed. If selection and pricing is suitable, click Continue.
Accept the Terms and Conditions to complete your order. Your Customer details are displayed for you information. Double-check your details. Then click Order Now
Once your order has been processed successfully, you will be notified. To go back to your package to begin setup of your new 1&1 Mail Business account(s), click Overview of your 1&1 contracts at the top of the page to return to your Administration Page.