mbox Header Extractor (expert)

Processes messages provided by the “mbox Reader” node, and extracts all message headers into individual columns.

In general, a header with a given name may occur several times times within a single message, thus this node allows different strategies for mapping a header to a column (see below “Mapping”).

Options

Input

The binary input column which holds the messages

Remove input column

Enable to drop the input column from the result table

Mapping

Specify how the header values should be mapped to column values; the following strategies are available:

Collection Cell: Create a collection cell for each header with all values.
String Cell (first): Create a string cell with the first occurring value.
String Cell (concatenated): Create a string cell with all values concatenated with “comma + space”.

Input Ports

: Parsed mbox, one message per row

Output Ports

: A table with columns for each message header which occurred in the input table

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Installation

To use this node in KNIME, install the extension mbox Nodes from the below update site following our NodePit Product and Node Installation Guide:

v5.9

A zipped version of the software site can be downloaded here.

Plugin provider: Philipp Katz

Plugin version: 2.3.0.202309171531

On NodePit since: 2025-12-11

Last update: 2026-01-26

KNIME versions: Since v3.6

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