Directly import MBOX emails into Gmail account using MBOX to Gmail Tool. For using this software, you need to have only login details of your Gmail ID to import MBOX emails into Gmail. The tool gives two options for importing MBOX mailbox into Gmail: 1. Import all MBOX mailboxes into single Gmail account, or 2. Import each MBOX mailbox into different Gmail account. So you can choose any option accordingly to import MBOX emails into Gmail. You can also import unlimited MBOX mailboxes into Gmail account without any issue using Add Folder option of the MBOX to Gmail Import Tool. To check its working method, you can first use its free download version that allows importing first 20 emails from each MBOX mailbox into Gmail account without any cost.