To import from Outlook, select some messages (or a folder) and press the capture key (F1 or fn-F1). EagleFiler will preserve the message flags, read status, and categories. EagleFiler skips messages that have been assigned the “OmitFromArchive” category in Outlook.
Note: Dragging individual mailboxes or messages from Outlook to EagleFiler may also work, but using the capture key is recommended because it is more reliable.
Importing Message Files
To import messages as individual .eml files instead of as mailbox files, use the Import From Outlook script.
Importing All Your Mail
To import all your mail at once, use a smart folder to show all the messages:

Importing a Folder and Its Subfolders
To import from multiple folders at a time, use a smart folder to show messages from multiple folders at once:
Importing PST Files
To import .pst files from the Windows version of Outlook, import them into the Mac version of Outlook, then select the messages and press the capture key.
The Mac version of Outlook has an AppleScript bug that affects some messages imported from Windows Outlook. This can prevent the message bodies from transferring to EagleFiler, making the messages appear blank (aside from the headers). To work around this bug, instead of importing via the capture key, import by dragging the mail folder (or individual messages) from Outlook to a folder in the Finder; this will export the messages (but not the message flags, read status, or categories). You can then drag the files from the Finder into EagleFiler to import them.
Another option is to one of the various Windows utilities that can convert from PST format to Mbox format, and then to import the Mbox files into EagleFiler.