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A message transfer agent receives mail from either another MTA, a mail submission agent (MSA), or a mail user agent (MUA). The transmission details are specified by the Simple Mail Transfer Protocol (SMTP). When a recipient mailbox of a message is not hosted locally, the message is relayed, that is, forwarded to another MTA.
The first sole-authored book entitled Digital Sociology was published in 2015, [6] and the first academic conference on "Digital Sociology" was held in New York, NY in the same year. [ 7 ] Although the term digital sociology has not yet fully entered the cultural lexicon, sociologists have engaged in research related to the Internet since its ...
Originally, ARPANET, UUCP, and Internet SMTP email allowed 7-bit ASCII text only. Text files were emailed by including them in the message body. In the mid 1980s text files could be grouped with UNIX tools such as bundle [1] [2] and shar (shell archive) [3] and included in email message bodies, allowing them to be unpacked on remote UNIX systems with a single shell command.
A PDF file is organized using ASCII characters, except for certain elements that may have binary content. The file starts with a header containing a magic number (as a readable string) and the version of the format, for example %PDF-1.7. The format is a subset of a COS ("Carousel" Object Structure) format. [23]
The term electronic mail has been in use with its modern meaning since 1975, and variations of the shorter E-mail have been in use since 1979: [2] [3] email is now the common form, and recommended by style guides. [4] [5] [6] It is the form required by IETF Requests for Comments (RFC) and working groups. [7] This spelling also appears in most ...
The term mail in the context of messages between computer users has been in use since the 1960s. In RFCs relating to the ARPANET, network mail was used since 1973. [8] [9] Historically, the term electronic mail is any electronic document transmission. For example, several writers in the early 1970s used the term to refer to fax document ...
A science – systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe. [1] [2] [3] Major category of academic disciplines – an academic discipline is focused study in one academic field or profession. A discipline incorporates expertise, people, projects, communities ...
The use of the File Transfer Protocol (FTP) for "network mail" on the ARPANET was proposed in RFC 469 in March 1973. [7] Through RFC 561, RFC 680, RFC 724, and finally RFC 733 in November 1977, a standardized framework for "electronic mail" using FTP mail servers on was developed. [8] [9] SMTP grew out of these standards developed during the 1970s.