The phrase signals that the subsequent content is directly related to and draws its basis from the information contained within a specific email message. It establishes a context for the ensuing details, implying that the email serves as a primary source or a foundation for the information being presented. For example, a report might begin by noting that the data presented is sourced from a particular email containing initial survey results.
This form of referencing is valuable because it provides transparency and traceability. By explicitly linking information to its source, it allows readers to verify the accuracy and completeness of the presented details. It enhances accountability and credibility by clearly identifying the origin of the claims or conclusions being made. Historically, this method of citation mirrors established practices in academic writing where sources are meticulously referenced to support arguments and ensure intellectual honesty.