# Exclude Metadata from the Extracted Text File

When a mail message is extracted, the message text and header information (`To`, `From`, `Sent`, and so on) is extracted to a text file. You can prevent the header information from appearing in the text file.

To exclude the header information, call the `ExcludeMailHeader` property of the `ExtractSubFileExtractConfig` object, and pass `ExtractSubFileExtractConfig` to the `ExtractSubFile` method. For example:

    m_excludeMailHeader = true;
    extconfig = new ExtractSubFileExtractConfig();

    extconfig.ExcludeMailHeader = m_excludeMailHeader;
    extinfo = m_objFilter.ExtractSubFile(extContextID, i, extconfig);

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