The easiest way to import MBOX to Hotmail is by using Advik MBOX Converter. This tool is simple to use and does not need any special skills. You just install the software, load your MBOX file, and select IMAP as the saving option. After that, enter your Hotmail email and password, and click Convert. All your emails, along with attachments and folders, will be moved to your Hotmail account quickly and safely. This saves you a lot of time compared to doing it manually.