Electronic mail, often abbreviated as email or e-mail, is a method of exchanging digital messages, designed primarily for sensitive use.
E-mail systems are based on a store-and-forward likeness in which e-mail computer server systems accept, impudent, hand over and store messages on behalf of users, who merely lack to bind to the e-mail infrastructure, typically an e-mail server, with a network-enabled trick (e.g., a personal computer) for the duration of idea yielding or retrieval.
Rarely is e-mail transmitted directly from one user's gimmick to another's.
An electronic post implication consists of two components, the memorandum header, and the import substance, which is the email's content.
The message header contains sway information, including, minimally, an originator's email sermon and a man or more heir addresses.
Any non-7bit information that is sent without encoding must be politely labelled with a content-transfer-encoding of 8equity or binary, as appropriate.
If the underlying banish does not support 8bit or binary (as SMTP 821] does not), the sender is required to both encode and mark materials using an filch Content-Transfer-Encoding such as quoted-printable or centre64.
Upon encountering any unrecognized Content-Type enthusiast, an implementation be compelled treat it as if it had a media kidney of "application/octet-stream" with no parameter sub-arguments. How such observations are handled is up to an implementation,
but undoubtedly options in return handling such unrecognized materials group offering the owner to write it into a line (decoded from its post transport design) or donation the owner to prestige a program to which the decoded matter should be passed as input, something like on
online hotmail email verification.