The "Update" link up above has been modified slightly, but only to comment on the amount of traffic at the blog site where the OneCare email problem first appeared. The Microsoft blog site is now at 173 posts, with lots of fairly pissed people contributing. As a casual interest thing, Microsoft Support Blog might be interesting to read, for a view of how Microsoft outsourcing of support has failed incredibly; but I'll have to read it more closely before I can tell if there's anything of real help for Outlook or Outlook Express people using OneCare.

Microsoft has produced a Knowledge Base article that gives instructions for what to do if your email disappears:

E-mail files are quarantined by Windows Live OneCare KB934614.

If you're using OneCare, and Outlook or Outlook Express I would recommend that you visit the page and save it to your own machine (preferably as a .mht - web archive file) for future reference. You may also want to bookmark the KB article page so you can check for updates.

Debate in the Support thread above suggests that the KB article may not cover all possible cases, but for most people it probably provides a way to recover if something (or everything) disappears.

I have NOT SEEN any reports of similar results with any other email programs, but can't rule out the possibility that some other ones may be similarly affected.

John