under files you can export your messages and save them in a folder. I do this
just before backing up other folders for rebuilding in case of problems.
then when you set up mail again you can import from that folder.
That's very helpful. One other thing if you don't mind. Do you now how to
display the backed up emails with their English name rather than the numeric
key that has been assigned. I can see the nae if I position the cursor over
the file but it's a laborious way of doing it.