Copy data from Thunderbird to Outlook 2007 (Windows)

Thunderbird uses the mbox file format (even though it doesnt add that file extention)

To get these emails into Outlook 2007 you first need to convert them to .eml files and then import to Windows Mail and then from Windows Mail import to Outlook .

Thunderbird to mbox

Open in windows explorer the location of your thunderbird data files (probably c:documents and settingsuserapplication datathunderbirdprofileshdjsd.defaultMaillocal folders)

Rename the file called INBOX to INBOX.mbox

You may want to copy the files first just incase something goes bad and then do the same for all the other folders you want (sent, trash etc)

.mbox to .eml

Go to and get IMAPSize.

After its installed under tools is mbox2eml, select the mbox files and it will extract all the .eml files

.eml to Microsoft Mail

Open the folder you extracted all the .eml files to and then open Microsoft Mail

You should now be able to select all the eml files in Windows Explorer and drop and drag them into the approperate folder in Microsoft Mail.

Microsoft Mail to Microsoft Outlook 2007

Close Microsoft Mail and Open Outlook

Click Tools and Import

Select “Import from another program of file”

Select “Outlook Express 4.x, 5.x, 6.x or Windows Mail”

Click OK

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