There is no limit to how many GigaMails you can purchase for each domain name.
In fact you can assign up to 5 GigaMails, reaching a total size of 25GB, to as many email accounts as you like.
If you need more than the standard five email accounts which come with the domain, you can purchase the Unlimited Email service and as many GigaMails as YOU like, from the “Additional Service” section of the website: hosting.aruba.it.
The Gigamails can be managed from the Mail Admin control panel found at webmail.aruba.it by logging in with the email@example.com account and the relevant password.
The cost of each GigaMail is 5 euro/year (+ VAT).