The distinction refers to the precise location of content within an electronic mail communication. Content positioned directly within the body of the message is considered to be incorporated in the email. Conversely, content existing as a separate, attached file is designated as being available on the email.
The accurate placement of data impacts accessibility and security. Content situated in the message is typically readily viewable without additional steps, facilitating quicker comprehension. However, sensitive data transmitted on the message, as a separate file, allows for enhanced encryption and access control, mitigating potential data breaches and promoting secure information exchange.