This feature is available to business customers who either use IncaMail in their e-mail client (with Outlook add-in) or have integrated IncaMail into their business software (via IncaMail interface APIs). These customers can also use large files in the IncaMail web interface. If you activate a virtual mailbox, the large files feature is also available there. The virtual mailbox allows customers to receive messages by IncaMail easily and securely, including delivery of large files. Customers who only use the web interface do not have access to large files. This applies to both the free services and the subscriptions (Premium).