Editing Mbox (section)

== Mail storage protocols ==
Unlike the Internet protocols used for the exchange of email, the format used for the storage of email has never been formally defined through the [[Request for Comments|RFC]] standardization mechanism and has been entirely left to the developer of an email client. However, the [[POSIX]] standard defined a loose framework in conjunction with the [[mailx]] program. In 2005, the application/mbox media type was standardized as RFC 4155, which hinted that mbox stores mailbox messages in their original Internet Message (RFC 2822) format, except for the used newline character, seven-bit clean data storage, and the requirement that each newly added message is terminated with a completely empty line within the mbox database.<ref name="RFC4155" /><ref name="RFC2822">{{cite web |editor-last=Resnick |editor-first=P. |title=Request for Comments: 2822 – Internet Message Format |url=https://datatracker.ietf.org/doc/html/rfc2822 |date=April 2001 |website=[[Internet Engineering Task Force]] |access-date=17 May 2021 |archive-date=31 March 2023 |archive-url=https://web.archive.org/web/20230331010336/https://datatracker.ietf.org/doc/html/rfc2822 |url-status=live }}</ref>