Disclosed herein is a secure messaging engagement hub for structuring of unstructured electronic messages. The secure messaging engagement hub has a natural language processor that structures an unstructured electronic message. The natural language processor structures the unstructured electronic message by using a lexical parser to parse free text within the unstructured electronic message. The natural language processor also may tokenize the parsed free text into tokens representing components of the parsed free text. Message component n-grams are generated based on the tokens representing the components of the parsed free text. The tokens are coded with various metadata tags based on an analysis of the tokens. The metadata tags indicate message components of the tokens. And a structured electronic message corresponding to the unstructured electronic message is generated, the structured electronic message comprising the tokens and the metadata tags.