Electronic correspondence, often skimpy as email or e-mail, is a method of exchanging digital messages, designed first and foremost for human use.
E-mail systems are based on a store-and-forward likeness in which e-mail computer server systems acknowledge, impudent, deliver and department store messages on behalf of users, who only lack to bind to the e-mail infrastructure, typically an e-mail server, with a network-enabled device (e.g., a private computer) for the duration of idea offering or retrieval.
Hardly ever is e-mail transmitted directly from ditty operator's stratagem to another's.
An electronic correspondence note consists of two components, the address header, and the missive core, which is the email's content.
The communication header contains control advice, including, minimally, an originator's email address and joke or more recipient addresses.
Any non-7suspicion data that is sent without encoding ought to be nicely labelled with a content-transfer-encoding of 8equity or binary, as appropriate.
If the underlying banish does not in 8minute or binary (as SMTP 821] does not), the sender is required to both encode and identification figures using an filch Content-Transfer-Encoding such as quoted-printable or background64.
Upon encountering any unrecognized Content-Type ground, an implementation be obliged act towards it as if it had a media classification of "application/octet-stream" with no parameter sub-arguments. How such observations are handled is up to an implementation,
but seemly options in return handling such unrecognized text group offering the owner to take down it into a line (decoded from its letters forward design) or sacrifice the owner to name a program to which the decoded data should be passed as input, something like on
trace email headers .