Pop 3 backup Ms-Outlook Express

go to start/search for files and type *.dbx
All your dbx files should show up and you'll see inbox, sent, deleted, etc. copy and paste them to a network share, reinstall OS, and replaced the dbx files in the new install with your old ones. You'llhave all your mail back.

Open Outlook Express

Tools>Options>Maintenance>Store Folder>Copy the path
Eg:-C:\WINDOWS\Profiles\ws3\Application Data\Identities\{1B7F6520-FA27-11D5-8DD6-0080AD41A5A5}\Microsoft\Outlook Express

Open Windows explorer Paste the path and press enter..you will reach the outlook express folder...Copy that entire folder into a floppy if it fits or to a network location or another harddisk.

reformat the harddisk and install outlook express.

open outlook express.

Configure your account. then go to Tools>Options>Maintenance>Store Folder>Copy the path

close the outlook express and Open Windows explorer Paste the path and press enter..you will reach the outlook express folder

rename that outlook express folder to outlook express.old

Copy the outlook express folder which you had taken as a backup before formatting. So now you will have two folder in

C:\WINDOWS\Profiles\ws3\Application Data\Identities\{1B7F6520-FA27-11D5-8DD6-0080AD41A5A5}\Microsoft\ outlook express and outlook express.old

Open outlook express and you will see that all your mails are safe and sound.

This is only to export your emails. For email address you have to export it into a .csv format..copy into a floppy or a network location. after reformatting and installing it, copy the .csv file into the HDD and import it back into the new OE.

All the best