Diseases, Conditions, Syndromes

Social scientists worldwide collaborate on COVID-19

More than 100 international social scientists are working together to collect immediate and longitudinal information on the key social science factors that might predict the spread of COVID-19. The project, known as PsyCorona, ...

Health

How to avoid information overload

Being able to go online offers a wealth of knowledge, keeps you connected to loved ones and makes all sorts of transactions more convenient. But there's a downside.

Diseases, Conditions, Syndromes

Emails show FDA worry after romaine outbreaks

After repeated food poisoning outbreaks tied to romaine lettuce, a U.S. food safety official shared his concerns in an internal email, saying the produce industry's water testing "failed in an epic and tragic way."

Medical economics

How susceptible are hospital employees to phishing attacks?

Cybersecurity threats are a rising problem in society, especially for health care organizations. Successful attacks can jeopardize not only patient data but also patient care, leading to cancellations and disruptions in the ...

Addiction

Walgreens worst violator in tobacco sales to minors, FDA says

(HealthDay)—Walgreens' high rate of violations for selling tobacco products to minors has led U.S. Food and Drug Administration Commissioner Scott Gottlieb, M.D., to ask for a meeting with the company to discuss the issue.

Genetics

US Nobelist was told of gene-edited babies, emails show

Long before the claim of the world's first gene-edited babies became public, Chinese researcher He Jiankui shared the news with a U.S. Nobel laureate who objected to the experiment yet remained an adviser to He's biotech ...

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E-mail

Electronic mail, often abbreviated as email or e-mail, is a method of exchanging digital messages, designed primarily for human use. E-mail systems are based on a store-and-forward model in which e-mail computer server systems accept, forward, deliver and store messages on behalf of users, who only need to connect to the e-mail infrastructure, typically an e-mail server, with a network-enabled device (e.g., a personal computer) for the duration of message submission or retrieval. Rarely is e-mail transmitted directly from one user's device to another's.

An electronic mail message consists of two components, the message header, and the message body, which is the email's content. The message header contains control information, including, minimally, an originator's email address and one or more recipient addresses. Usually additional information is added, such as a subject header field.

Originally a text-only communications medium, email is extended to carry multi-media content attachments, which were standardized in with RFC 2045 through RFC 2049, collectively called, Multipurpose Internet Mail Extensions (MIME).

The foundation for today's global Internet e-mail service was created in the early ARPANET and standards for encoding of messages were proposed as early as, for example, in 1973 (RFC 561). An e-mail sent in the early 1970s looked very similar to one sent on the Internet today. Conversion from the ARPANET to the Internet in the early 1980s produced the core of the current service.

Network-based email was initially exchanged on the ARPANET in extensions to the File Transfer Protocol (FTP), but is today carried by the Simple Mail Transfer Protocol (SMTP), first published as Internet Standard 10 (RFC 821) in 1982. In the process of transporting email messages between systems, SMTP communicates delivery parameters using a message envelope separately from the message (headers and body) itself.

This text uses material from Wikipedia, licensed under CC BY-SA