What is the English name of the email?

Chinese name: E-mail English name: E-mail Definition: A modern communication method for transmitting and receiving information to each other through the network. Applied disciplines: Communication Technology (first-level subject); Service and Application (second-level subject)

E-mail (electronic mail, referred to as E-mail, symbol: @, also nicknamed "Yimeier" by everyone) ”) Also known as electronic mailbox and electronic post, it is a communication method that uses electronic means to provide information exchange. It is the most widely used service on the Internet: through the network's email system, users can use it at a very low price (no matter where they are sent, they only need to pay the phone and Internet fees), in a very fast way (a few seconds can be sent to any destination you specify in the world) to contact network users in any corner of the world. These emails can be in various forms such as text, images, sounds, etc. At the same time, users can get a large number of free news, special emails, and realize easy information search.

Basic properties

Principles

1.1. Sending and receiving emails Principles of sending and receiving emails on the Internet

Electronics Mail

It can be vividly described by mailing packages in our daily life: when we want to send a package, we must first find any post office that has this business, and after filling in the recipient After entering the name, address, etc., the package is sent and arrives at the post office where the recipient is located. Then when the other party picks up the package, he must go to this post office to take it out. Similarly, when we send an email, the email is sent by the email sending server (any one can be used), and the other party's email receiving server is determined based on the recipient's address and the letter is sent to that server. The recipient can only receive the email by accessing this server. 1.2. Composition of email address The format of email address consists of three parts. The first part "USER" represents the account of the user's mailbox. For the same mail receiving server, this account must be unique; the second part "@" is the separator; the third part is the domain name of the mail receiving server of the user's mailbox, using to mark its location.

Features

This is incomparable to any traditional method. It is precisely because of the ease of use, rapid delivery, low fees, easy storage, and unimpeded global access of email that email is widely used and has greatly changed the way people communicate. In addition, email can also be used for one-to-many email delivery, and the same email can be sent to many people at one time. The most important thing is that email is a system directly oriented to the exchange of information between people in the entire Internet and even in all other network systems. Its data senders and receivers are both people, so it greatly satisfies a large number of existing needs. Communication needs between people. Email refers to a communication method that uses electronic means to transmit letters, documents, materials and other information. E-mail combines the characteristics of telephone communication and postal mail. It can transmit information as fast as a telephone and can make the recipient feel at the receiving end just like a letter.

E-mail

Receive to the transcript. E-mail system is also called computer-based mail messaging system. It participates in the entire processing process from when the email enters the system to when the email reaches its destination. Emails can be sent not only through the telephone network, but also through any other communication network. When using the telephone network, information can also be sent during off-peak periods, which is of particular value for business mail. An electronic system for limited users controlled by a central computer and a small computer can be regarded as a computer conference system.

Working process

1. The email system is a new type of information system, which is the product of the combination of communication technology and computer technology. The transmission of email is completed through the system software Simple Mail Transfer Protocol (SMTP), which is an email communication protocol under the Internet. 2. The basic principle of email is to set up an "emailbox system" on the communication network, which is actually a computer system. The hardware of the system is a high-performance, large-capacity computer.

The hard disk is used as the storage medium of the mailbox. A certain storage space is allocated to the user on the hard disk as the user's "mailbox". Each user has his or her own e-mailbox. And determine a username and password that the user can modify at will. The storage space includes three parts: space for storing received letters, editing letters, and letter archiving. Users can use passwords to open their own mailboxes and perform various operations such as sending, reading, editing, forwarding, and archiving letters. System functions are mainly implemented by software. 3. Email communication is carried out between mailboxes. The user first opens his or her own mailbox, and then sends the email to be sent to the other party's mailbox by typing commands. Mail is delivered and exchanged between mailboxes and with another mail system. When the recipient picks up the mail, he uses a specific account number to retrieve it from the mailbox. The working process of email follows the client-server model. The sending of each email involves the sender and the receiver. The sending method constitutes the client, and the receiver constitutes the server. The server contains the e-mail boxes of many users. The sender sends the edited email to the post office server (SMTP server) through the mail client program. The post office server identifies the recipient's address and sends the message to the mail server (POP3 server) that manages the address. The mail server stores the message in the recipient's e-mail box and notifies the recipient of the arrival of new mail. After the recipient connects to the server through the mail client program, he will see the server's notification and then open his or her e-mail box to check the mail. Generally, individual users on the Internet cannot receive emails directly. Instead, they apply for an email box on the ISP host, and the ISP host is responsible for receiving emails. Once a user's email arrives, the ISP host moves the email to the user's email box and notifies the user of new email. Therefore, when an email is sent to another customer, the email is first sent from the user's computer to the ISP host, to the Internet, to the recipient's ISP host, and finally to the recipient's personal computer. The ISP host acts as a "post office" and manages the e-mail boxes of many users. Each user's email address is actually the account name applied for by the user. Each user's email mailbox occupies a certain amount of hard disk space on the ISP host. Since this space is limited, users must regularly check and read the emails in their email boxes in order to free up space to receive new emails.

Address format

The domain_name here is the identifier of the domain name, which is the domain name of the email destination to which the email must be delivered. And someone is the email address on the domain name. The suffix generally represents the nature of the domain name and the region code. A domain name is really technically a mail exchange, not a machine name. Common email protocols include the following: SMTP (Simple Mail Transfer Protocol), POP3 (Post Office Protocol), and IMAP (Internet Mail Access Protocol). These protocols are all defined by the TCP/IP protocol suite. SMTP (Simple Mail Transfer Protocol): SMTP is mainly responsible for how the underlying mail system transfers mail from one machine to another. POP (Post Office Protocol): The current version is POP3. POP3 is a protocol for transferring emails from email boxes to local computers. IMAP (Internet Message Access Protocol): The current version is IMAP4, which is an alternative protocol to POP3. It provides new functions for mail retrieval and mail processing, so that users can see the mark of the mail without downloading the body of the mail.

E-mail

Summary of the question, you can operate the mails and folder directories on the server from the mail client software. The IMAP protocol enhances the flexibility of e-mail, while also reducing the direct harm of spam to the local system, while relatively saving users' time in checking e-mail. In addition, the IMAP protocol can remember the user's operations on emails while offline (such as moving emails, deleting emails, etc.) and will automatically execute them the next time the network connection is opened. Two current email acceptance protocols and one email sending protocol support secure server connections.

Support for SSL connections is integrated into most popular email client programs. In addition, many encryption technologies are also applied to the process of sending, receiving and reading emails. They can provide encryption strengths ranging from 128-bit to 2048-bit. Both one-way encryption and symmetric key encryption are also widely supported. Edit the origin of this paragraph

As for the world's first electronic mail (e-mail), according to the data, there are currently two theories:

The first theory

< p>The world's first email was a short message sent by computer scientist Professor Leonard K. to his colleagues in October 1969. According to "Internet Weekly", the world's first email was a short message sent by computer scientist Professor Leonard K. to his colleagues [1][2] (the time should be October 1969). The message has only two letters: "LO." Professor Leonard K. is therefore known as the father of email. Professor Leonard K. explained, "I was trying to communicate through a computer at the University of California and another computer at the Stanford Research Center near San Francisco. What we did was log in from one computer to the other

Email

The way to log in at that time was to type L-O-G. So we typed L and asked the other party: 'Did you receive L?' and the other party replied: 'Yes.' Type O and G in sequence. Before receiving the confirmation reply from the other party, the system was paralyzed, so the first online message was 'LO', which means 'Hello!'"

Two versions

In 1971, the ARPANET funded by the U.S. Department of Defense was in full swing, and a very acute problem arose: the scientists participating in the project were doing different jobs in different places. , but they cannot share their respective research results well. The reason is simple, because everyone uses different computers, and everyone's work is useless to others. They urgently need a method to transfer data between different computers through the network. Ray Tomlinson, a Ph.D. from MIT who worked for ARPANET, merged the functions of a software that could be copied between different computer networks with a communication software that was only used for a single computer, and named it SNDMSG (Send Message). To test, he used the software to send his first email on ARPANET, to himself on another computer. Even though Tomlinson himself couldn't remember the content of the email, the moment was still historically significant: email was born. Tomlinson chose the "@" symbol as the separation between the user name and the address, because this symbol is relatively rare and will not appear in anyone's name, and the pronunciation of this symbol also means "in". ARPANET scientists welcomed this groundbreaking innovation with great enthusiasm. Their genius ideas and research results can now be shared with colleagues at the fastest speed - almost imperceptibly fast. Looking back now, many of them feel that e-mail played a major role in ARPANET's huge success. Edit this paragraph Email server system

Email services are provided by specialized servers. Email services such as Gmail, Hotmail, NetEase Mailbox, and Sina Mailbox are also built on email servers, but large email services Business systems are generally independently developed or implemented through secondary development of other technologies. The main email servers include the following: 1. Mail system based on Postfix/Qmail. For example, the MTA of NetEase's mailbox is

electronic processing software

based on Postfix, and Yahoo's mailbox is based on the Qmail system. 2. Microsoft Exchange mail system. 3. IBM Lotus Domino mail system. , 4. Scalix mail system 5. Zimbra mail system 6. MDeamon mail system Among them, the Exchange mail system is easy to manage because it is integrated with Windows. It is the most used email system in enterprises.

IBM Lotus Domino has strong comprehensive functions and is widely used by large enterprises. The mail system based on Postfix requires strong technical strength to implement, but the performance can be very high and the security is very good. At the same time, the software is open source and free. Edit this paragraph Selection of email addresses

Before choosing an email service provider, we must understand the purpose of using email and make targeted choices based on our different purposes. If you frequently contact foreign customers, it is recommended to use a foreign email address. Such as Gmail, Hotmail, MSN mail, Yahoo mail, etc. If you want to use it as a network hard drive and often store some picture materials, etc., then you should choose a mailbox with large storage capacity, such as Gmail, Yahoo mail, NetEase 163 mail, 126 mail, yeah mail, TOM mail, 21CN mail, etc. is a good choice. If you have a computer, it is best to choose a mailbox that supports the POP/SMTP protocol. You can

email

and download emails to your own through email client software such as Outlook and Foxmail. On the hard drive, you don’t have to worry about insufficient mailbox size, and it also prevents others from stealing your password and peeking at your mail later. Of course the premise is not to keep a copy on the server. I recommend doing this mainly from a security perspective. If you often need to send and receive large attachments, Gmail, Yahoo mail, Hotmail, MSN mail, NetEase 163 mail, 126 mail, Yeah mail, etc. can all meet your requirements. If you want to know your new emails as soon as possible, it is recommended to use China Mobile's Monternet Xixin Mail. When an email arrives, you will be notified by SMS. China Unicom users can choose Ruyi Email. If you are only using it domestically, then QQ email is also a good choice. An email address with a QQ number allows your friends to send instant messages to you through QQ. Of course you can also use an alias email address. In addition, with Tencent's acquisition of foxmail, Tencent's technology in the email field has been greatly strengthened. So you should feel safe using QQ mailbox. In addition, you can also choose local mailboxes according to your region. For example, friends in Beijing can choose Qianlong.com mailbox, and friends in Guangzhou can choose 21CN mailbox. Friends who use paid mailboxes should pay attention to whether the price/performance ratio of the mailbox is worth spending money to buy, and also check whether they can pay for it in the long term. Currently, NetEase VIP mailbox and 188 Fortune Mail are very good, especially the ones that provide a variety of business card design solutions. It is user-friendly and highly recommended for everyone to use. You can also use the mailbox provided by your own broadband service provider. For example, Tietong users can choose the 68CN enterprise new speed mailbox. In fact, many people have a misunderstanding about the size of attachments that can be sent and received. Many people think that it must be large. In fact, generally speaking, sending some data attachments does not exceed 3MB. If the attachments are large, they can be compressed by WinZIP, WinRAR and other software before sending. Today's mailboxes basically support attachments of more than 4MB, and well-known mailboxes have provided more than 10MB of attachment sending and receiving space. Another issue that cannot be ignored is that your email supports large attachments. Does your friend's email also support large attachments? If you can send large attachments but your friend's email does not support accepting large attachments, then it is meaningless no matter how large your email can support attachments, so this issue is not important. You can also choose your email address based on your most commonly used IM instant messaging software. If you often use QQ, use QQ email. If you often use Yahoo Messenger, use Yahoo email. If you often use MSN, use MSN email or Hotmail. Of course, other email addresses are also acceptable. Register as an MSN account to use. If you like to use NetEase Paopao, use NetEase 163 mailbox. There is another more important issue that cannot be ignored. Among desktop operating systems, Windows operating system accounts for 90% of the current share

E-Mail

[3]. In other words, there are still 10% of friends using Linux and Apple operating systems.

Since the Firefox browser cannot well support many Java scripts in web pages, it is difficult for novices to configure the browser, which means they may have difficulties accessing their mailbox through WEB, so these friends must choose to support POP/SMTP Functional mailbox, send and receive emails through client software such as Kmail. Friends who use Linux and Apple Unix operating systems do not recommend using MSN mail and Hotmail. In addition to not supporting POP/SMTP, because they are Microsoft's competitors, in order to prevent Microsoft from using unfair methods to block email sending and receiving, so use the above Friends of operating systems are advised not to use Hotmail and MSN mail. There is no official MSN software from Microsoft on these operating systems. You can only use chat tool plug-ins to implement some of the functions of MSN.