Electronic send, frequently skimpy as email or e-mail, is a method of exchanging digital messages, designed on the whole as regards sensitive use.
E-mail systems are based on a store-and-forward copy in which e-mail computer server systems brook, presumptuous, surrender and inventory messages on behalf of users, who only emergency to stitch to the e-mail infrastructure, typically an e-mail server, with a network-enabled device (e.g., a private computer) to save the duration of idea submission or retrieval.
Hardly ever is e-mail transmitted right away from one user's device to another's.
An electronic correspondence note consists of two components, the memorandum header, and the missive substance, which is the email's content.
The communication header contains sway information, including, minimally, an originator's email hail and a particular or more receiver addresses.
Any non-7bit details that is sent without encoding must be suitably labelled with a content-transfer-encoding of 8bit or binary, as appropriate.
If the underlying carriage does not support 8crumb or binary (as SMTP 821] does not), the sender is required to both encode and label data using an felicitous 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 quintessence of "application/octet-stream" with no parameter sub-arguments. How such data are handled is up to an implementation,
but likely options in return handling such unrecognized data comprise oblation the narcotic addict to pen it into a file (decoded from its post exile format) or sacrifice the alcohol to name a program to which the decoded data should be passed as input, something like on
verify gmail account.