Microsoft Outlook Express backup file
File type: Email related data file, Archive and compressed file
A .boe file is a compressed backup of email messages created for Microsoft Outlook Express.
File type category:
Email related data file
Archive and compressed file
Date updated: October 7, 2026
The boe file extension is associated with Microsoft Outlook Express, an email and news client from Microsoft that was included with earlier versions of Internet Explorer for Microsoft Windows.
A .boe file contains compressed backup data for Outlook Express email messages. It was used to preserve message data for later recovery or transfer.
Microsoft Outlook Express is discontinued, so the boe file format is no longer commonly used. ZipZag for Microsoft Windows may still be able to access the compressed data.
On Microsoft Windows, try opening the file with ZipZag, which may be able to read the compressed backup. The original version of Microsoft Outlook Express may be needed to restore the messages.
Some .boe files may be ZIP files and can potentially be extracted with a ZIP utility. The original version of Microsoft Outlook Express may be required to recover the extracted messages.
Software applications that can open boe files:
Microsoft Windows
ZipZag
Software apps that extract boe files:
Microsoft Windows
ZipZag
Software apps that backup boe files:
Microsoft Windows
Software apps that manage or store settings in boe files:
Microsoft Windows
Software applications that handle other tasks involving boe files:
Microsoft Windows
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