Moving mailbox files without converting

Michael,
I imported 3 mailboxes from Apple Mail. Then I moved each mailbox in to a folder that named its origin. Does that cause the messages to be converted from mbox to .eml? I do not want that. Here is what it looks like:

Thanks.

Moving mailboxes or other files around within EagleFiler does not change their format. EagleFiler will only convert an existing message to .eml format if you drag and drop a message that’s inside a mailbox onto a folder or if you use the Merge Message Files command.