Compact and back up mail folders

To compact and back up e-mail folders

Select an e-mail folder.
On the File menu, point to Folder, and then click Compact.
To back up the folder, find the folder file, and then copy it to a backup folder, floppy disk, or network drive. Outlook Express e-mail folders have a .dbx extension (for example, "Sent Items.dbx").

Notes

Some message files might be too large to back up onto a floppy disk.
If you are using a program other than Outlook Express to send e-mail messages to newsgroups, check your e-mail program's documentation for information about compacting and deleting e-mail folders.