If you send e.g. a rich text document from DEVONthink or DEVONnote to someone else and the document contained links to other documents, the recipient will not be able to use the links as the other documents are missing.
As a workaround select both the document and all linked documents and choose File > Export > As Website. This converts all documents to HTML and resolves the links. The created folder containing all files should even be readable on Windows or Linux.