BACKUP
* The following proceedures were tested on Microsoft® Outlook Express® 6.0. The author makes no guarantees that this proceedure will work on other versions. However, the key element to backing up your data is locating the correct folder and files. Once this is accomplished, you simply copy the folder to your backup location.
o You can find out which version of Outlook Express you are running by starting the program and then clicking on Help > About Microsoft Outlook Express.
* Microsoft Outlook Express stores your email, newsletter and contact information is a single folder. Within this folder there are individual database files (*.dbx) for each folder contained in Outlook Express. For example, there will exist an Inbox.dbx, an Outbox.dbx, a Contacts.dbx and a variety of others including any new folders that you have created using Outlook Express (if you created a "Friends" folder there will be a corresponding Friends.dbx file). By backing up these database files you will be backing up all your Outlook information . The hard part is locating the files...
* You can locate the folder containing these files by:
1. Opening Outlook Express and clicking on Tools > Options.
2. Click on the Maintenance Tab and then on the "Store Folder" button.
3. You will be presented with a "Store Location" window displaying the path to the folder containing the database files.
4. Using your mouse cursor, select the entire path, then copy (CTRL + C) and paste (CTRL + V) the path into Windows Explorer (Explorer can be found here: Start > Programs > Accessories > Windows Explorer). Erase the "Outlook Express" from the end of the path and press the "Enter" key on your keyboard. Explorer will automatically open the folder containing your Outlook Express folder that you need to back up. .
5. Copy and paste this folder to a Zip disk or other backup source. It will probably be too large to copy to a floppy disk.
RESTORE
* If you have followed the steps above to backup your Outlook Express data, restoring is simple. All you do is copy the backup Outlook Express folder into the folder that you located when you initially backed up your work.
* Keep in mind that if you overwrite your existing Outlook Express folder with your backup folder, any new data since the time of the backup will be deleted. If you have recent data that is not on the backup copy and you don't want to loose the recent data, then you can use the "Import" command to add data instead of overwriting data.
1. Click on File > Import and select the type of database you will be importing. For example, if you desire to import your email messages, click "Messages..."
2. Select the program your backup files were created from. In our example, we are simply restoring backup files from the same program and would choose "Microsoft Outlook Express 6".
3. Select the "Import mail from an OE6 store directory" option.
4. Click "Browse" when asked for a location.
5. Browse to the location of your backup folder.
6. Select "All folders" and click "Next >".
7. When the Import Wizard completes importing your messages, click "Finish".
8. For more information directly from Microsoft, click here.
here you can read the full tutorial how to backup outlook express.