This might be a naive question, but I don&#x27;t know any better: Why can&#x27;t your mailbox be represented on a server as a directory, perhaps like Maildir format, and then synchronised to your device using a directory sync tool, such as rsync?<p>Changes, or online access, could be done using any standard remote file access method, such as sftp.<p>Are there downsides to this approach?