I have a number of messages in my Live/Outlook(?) Inbox which did not download to my email client. I discovered these when I knew that the senders had sent them as I can see them in the Inbox, but I have not seen them in the client.  How do I mark these so that they will download?

Running XP-Pro SP3 all updates to 07 Feb 2013.  Client is Outlook Express [I know - unsupported!]

Phil