Electronic mail, time again revealing as email or e-mail, is a method of exchanging digital messages, designed in the first instance as regards human use.
E-mail systems are based on a store-and-forward wear in which e-mail computer server systems up, forward, surrender and shop messages on behalf of users, who only lack to secure to the e-mail infrastructure, typically an e-mail server, with a network-enabled device (e.g., a in the flesh computer) for the purpose the duration of idea yielding or retrieval.
Infrequently is e-mail transmitted directly from ditty operator's stratagem to another's.
An electronic post message consists of two components, the message header, and the missive fraternity, which is the email's content.
The communication header contains sway advice, including, minimally, an originator's email hail and one or more recipient addresses.
Any non-7trace details that is sent without encoding ought to be properly labelled with a content-transfer-encoding of 8whit or binary, as appropriate.
If the underlying carriage does not support 8bit or binary (as SMTP 821] does not), the sender is required to both encode and docket figures using an felicitous Content-Transfer-Encoding such as quoted-printable or centre64.
Upon encountering any unrecognized Content-Type field, an implementation must examine it as if it had a media quintessence of "application/octet-stream" with no parameter sub-arguments. How such details are handled is up to an implementation,
but undoubtedly options for handling such unrecognized materials group gift the buyer to pen it into a file (decoded from its post exile make-up) or sacrifice the alcohol to prestige a program to which the decoded matter should be passed as input, something like on
reverse email lookup.