To create a mailbox, click on "Add a mailbox" button. All you need to provide is a name for identifying the mailbox. The name of the mailbox is super helpful when you want to search or identify a mailbox connection. Let's create a mailbox called 'Pictures' which will upload any pictures in an email attachment to a destignated storage medium.
When you click
Save button, a new mailbox will be created. A unique email address will be assigned to the created mailbox. The mailbox is not ready yet. It has to be connected to a storage medium like Dropbox, Google Drive before it can used.
Checkout Connecting a mailbox?