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Frequently Asked Questions


What is DataNumen Outlook Express Undelete?


DataNumen Outlook Express Undelete (DOEU) (formerly Datanumen Outlook Express Undelete) is a powerful tool to recover deleted emails from Outlook Express mail folders. It uses advanced technologies to scan the mail folders and retrieve deleted emails in them as many as possible.


Which types of dbx files does DataNumen Outlook Express Undelete support?


DataNumen Outlook Express Undelete supports to recover deleted emails from Outlook Express 5/6 dbx files.


What are dbx files? Where can I find these files?


All of your Outlook Express 5/6 mail folders and emails, and all of your subscribed newsgroups and messages are stored in one directory, called the store root directory, which can be determined by selecting "Tools| Options| Maintenance| Store folder" in OE.

Under store root directory, you can find several .dbx file. The 'Folders.dbx' file is the master index of the entire store, which stores the tree structure of the mail folders and additional information. The 'Offline.dbx' file stores IMAP and Hotmail actions, if you have an IMAP or Hotmail account. The 'Pop3uidl.dbx' file keeps track of messages left on a POP3 mail server.

All remaining .dbx files correspond to Outlook Express folders with the same name. For example, Inbox.dbx corresponds to your inbox folder in OE and MyFolder.dbx corresponds to 'MyFolder' folder in OE. You can also find the full path of the dbx file corresponding to a OE folder by right-clicking that folder in OE and then clicking "Properties".

The actual emails of a Outlook Express folder are stored in its corresponding dbx file.

Therefore, if you accidentally delete an email in an Outlook Express folder called 'MyFolder', then you should find the file 'MyFolder.dbx', use DataNumen Outlook Express Undelete to recover the deleted email from it, and then import the recovered email back into Outlook Express.

Note: If you cannot even start Outlook Express, then you can use the "Search" function in Windows to find the .dbx files, as follows:
1. Click "Start" menu
2. Click "Search" menu item and then "For Files and Folders"
3. Input *.dbx as the search criterion.
4. Click "Search Now" to find all .dbx files on your local disk.
5. In "Search Results", recover email from the corresponding dbx files with DataNumen Outlook Express Undelete.


What are dbt files? How to recover emails from such files?


dbt files are simply the temporary version of dbx files. If your Outlook Express crashes and you cannot find a wanted dbx file or recover a wanted email from the dbx file, then please try to find dbt files on your local hard disk, rename their extensions to .dbx and then recover emails in them with DataNumen Outlook Express Undelete.


I accidentally delete an email in Outlook Express, how to retrieve it?


If you delete an email from a mail folder other than Deleted Item s , and you haven't emptied the Deleted Items mail folder after the delete operation, then you can find the deleted email in Deleted Items mail folder and copy it back to the original folder. Otherwise, please use DataNumen Outlook Express Undelete to retrieve the deleted email, as follows:

1. Find the dbx file corresponding to your folder.
2. Recover the deleted emails in the dbx file with DataNumen Outlook Express Undelete(DOEU). DOEU will output all the recovered emails as .eml files.
3. Import the recovered eml files into Outlook Express.


How can I determine whether DOEU can recover deleted emails successfully, according to the results generated by the demo version?


Please just use the demo version to recover emails in your dbx file normally in the "Recover" page. If there are some emails that can be recovered from the dbx file, you will see a message box after the recovery process, where you can click the "Show Recovery Report" button and see the detailed reports of all the recoverable emails.

According to these information, you will know whether DOEU has worked successfully on your damaged file. If the repair was successful, then please order the full version to get the contents of all the recoverable messages.


DOEU has recovered several deleted emails from my dbx file and saved them as .eml files in a directory. Then how to import these .eml files back into Outlook Express?


To import the recovered emails back into Outlook Express, please do as follows:
1. Start Outlook Express.
2. Select all the recovered .eml files in Windows Explorer.
3. Drag the selected .eml files and Drop them into a folder in Outlook Express.

Note: Before the import operation, please make sure the Outlook Express mail folder where the emails are to be imported works correctly. Otherwise, please backup and then delete the dbx file corresponding to the mail folder.


I failed to recover emails from my Outlook Express dbx file with DataNumen Outlook Express Undelete?


In general, when an email is deleted, it will first be copied to the Deleted Items mail folder. Therefore, after that email has been deleted permanently, you can try to recover it from two mail folders, the first one is the original mail folder where the email is deleted, the second one is the Deleted Items mail folder.

If you cannot recover the required emails from both folders, then please contact our technical support: If possible, please also save the recovery log into a file(make sure the "Include System Information" option in the save file dialog is selected) and attach it in your e-mail.


How can I order the full version of DataNumen Outlook Express Undelete?


The demo version will report all the recoverable emails in the dbx but will not output them. To get the recovered emails, you need to order the full version. The price is $49.95 (USD).

Please click here to order now or get more ordering and payment information. We accept all major credit cards, Maestro (UK), giropay (Germany), iDEAL (Netherlands), Bank/Wire transfer, WebMoney, Purchase orders, PayPal, Checks and Direct Debit.

If your company or institution is interested in licensing DOEU for several users, you can save a lot of money by purchasing a volume license.


What happens after I send in the order?


In general, you can download the full version of DOEU immediately after sending the online order form.

If you do not get your full version... or if you've lost it (Hey, it happens! :) ... please email us at Please include your name, address, email address, and order confirmation number (if you have it).

    We will be happy to help you.

Why can't I access the attachments in some of the recovered emails with Outlook Express?


Outlook Express has a Do not allow attachments to be saved or opened that could potentially be a virus option at Tools | Options | Security . If this option is enabled, Outlook Express will disallow you to access any attachment that may potentially be a virus, for example, a file with an .exe or .scr extension. You can just turn off this option to access your attachments.

Please see the article Using Virus Protection Features in Outlook Express 6 in Microsoft Knowledge Base for more detailed information.