In order to add additional mailboxes to your Open-Xchange subscription, please follow these steps:
1. In your EuroDNS account, go to PRODUCTS > OX MAIL
2. Move the cursor to the domain concerned and click on View.
3. Click on Upgrade.
5. Add the number of additional email addresses (packs) you want to purchase and click on ADD TO CART.
6. Choose your invoice profile and the payment method.
7. Accept our terms and conditions and click on PLACE ORDER.