Email is a method of transmitting electronic messages over computer networks. Functionally, it operates by using standardized protocols to package and direct digital data from a sender's device to a recipient's designated electronic mailbox. These messages are routed through various servers, which act as intermediary points that ensure the continuous transfer of data across different interconnected systems. The foundational architecture involves client-side software and server-side components that manage message storage, retrieval, and delivery. This communication method has fundamentally changed interpersonal and professional correspondence by providing a nearly instantaneous, asynchronous means of transferring textual information, files, and multimedia content globally.