The hyphen, or dash, is a permissible character within the local part (the portion before the @ symbol) of an electronic mail address. For instance, an address may be structured as “first-last@example.com” or “department-name@domain.com.” This character facilitates the creation of more readable and descriptive email addresses.
Its inclusion provides flexibility in structuring email addresses, allowing for better organization and differentiation, particularly within larger organizations. Historically, the use of such characters evolved as email systems needed to accommodate varied naming conventions and departmental structures. This improved the ease of use and memorability of individual addresses.
