If you plan to import emails from another system, it is wise to plan ahead. Here are some considerations.
Whilst you could simply refile all your messages, this is far from practical.
Use the Bulk Uploader
The Bulk Uploader takes the pain out of migrating emails from your existing system to CloudFiler.
Where is the Help documentation for the Bulk Uploader?
The full documentation for the Bulk Uploader is provided with the tool and is accessed via the help icon in the top-right of its user interface.
Download the tool
The tool is available to your admin staff via the Licenses/Tokens/APIs section of your portal