Basic information of e-mail box

In the network, the e-mail box can automatically receive the e-mail sent by any e-mail box on the network, and can store electronic files with specified size and other formats. E-mail has a separate domain name, and its e-mail address is marked after @. The general format of e-mail is: user name @ domain name.

E-mail service is an information transmission service based on computer and communication network, which provides users with various types of information such as e-mail, digital fax of documents, images and digital voice by means of electric signal transmission and information storage. E-mail enables people to send and receive letters at any time, which solves the limitation of time and space and greatly improves work efficiency.

origin

In Fudan University and Shanghai Jiaotong University, a peculiar "post office" appeared in 1992. Here, instead of stamps and envelopes, a letter the size of stationery is delivered, and it only takes a few seconds for the letter to be displayed in front of the recipient. This is the mail. E-mail, like ordinary mail, also needs an address. Unlike ordinary mail, it is an electronic address. All users who have mailboxes on the Internet have their own e-mail addresses, and these e-mail addresses are unique. The mail server sends each email to each user's mailbox according to these addresses, and the email address is the user's email address. Just like ordinary mail, whether you can receive your email depends on whether you get the correct email address.

—A complete Internet e-mail address consists of the following two parts, with the following format: login name @ host name. Domain name.

The middle is separated by the symbol @, which means "in". On the left of the symbol is the login name of the other party, and on the right is the complete host name, which consists of host name and domain name. Among them, the domain name consists of several parts, each part is called a subdomain, and the subdomains are separated by dots. Each subdomain will tell users some information about this mail server. 1. The email address of the enterprise ends with the domain name of the company, so as to improve the corporate image of the company in the process of communicating with customers. And the free email address all end with the domain name of the service provider.

2. The management authority of the enterprise mailbox can modify the user's password, room, access rights, etc. , effectively prevent the company from losing business due to the resignation of the salesman.

3, high quality of service, effectively ensuring the smooth flow of corporate mail.

Although free email can also be used, it generally cannot meet the requirements of enterprise users. Especially the stability of sending and receiving, if the problem of not sending and receiving often occurs, it will definitely affect the business of the enterprise. Enterprise mailbox provides high-quality service for enterprise users, which has high security, stability and efficiency in sending and receiving, and also has high service ability in rejecting spam and virus mail.

4. Advantages of overseas freight forwarding.

As China is recognized as the second largest spam producer in the world by the international anti-spam organization, it often happens that emails sent overseas are rejected by free mailboxes. If the enterprise mailbox has an overseas forwarding server, this problem can be solved smoothly. Fast-the letter can be delivered to the other party in ten seconds.

● Security-Compared with other mailbox systems, e-mail is an "official mailbox" specially designed for business users, which is more rigorous.

Security measures.

● Perfect-Many functions are designed for business users. Users can not only communicate with e-mails at home and abroad through e-mail.

E-mail users and Internet users can exchange e-mails, and they can also send letters directly.

Send it to the fax machine, telex terminal and computer of packet switching network of the other party.

● Economy-1/3 to 1/2 of the general postal delivery fee. ● Send and receive letters-With e-mail, users can not only send ordinary letters, registered letters and urgent letters, but also

Ask the system to send a notice after the other party receives the letter, or send a note after reading the letter. There is still time.

Send, reply or forward the letter to others immediately after reading it, and deliver it at multiple addresses (a letter is sent to multiple people at the same time).

Users can write letters directly in the mailbox system, and the letters received by the other party will be classified and filed, and useless letters will be deleted.

● Direct delivery-if the other party is not a mailbox user, you can send the letter directly to the other party's fax machine, telex machine, printer or

On a computer in a packet-switched network.

Bulletin board-a bulletin box for everyone to use. Users can send the information they want to publish to this mailbox for public use.

Reading at home. Bulletin boards are suitable for issuing announcements, notices and advertisements.

Roaming function-CHINAPAC can be used to roam the whole country. The following is a general list of mailboxes commonly used by individual users in China. All listed mailboxes provide free mail service and can be used after registration. Ranked in no particular order.

163 mailbox

163 mailbox-the first brand of mailbox in China. Netease free e-mail, 3G space, supporting super-large 20MB attachments and 280MB network disk. Accurately filter more than 98% of spam.

Sina mail

Sina mailbox, capacity 2G, maximum attachment 15M, supporting POP3.

Tom mailbox

TOM mailbox, providing 1500 megabytes of storage space, sending and receiving emails faster, more stable and safer, professional online antivirus for 24 hours, rejecting all spam, with 50 megabytes of photo album and 30 megabytes of network hard disk, adopting the world's advanced load balancing technology stably and quickly, fundamentally optimizing the access, uploading and downloading speed, introducing the world's top antivirus software, and comprehensively resisting viruses, hackers and spam.

2 1cn mailbox

The basic capacity of 2 1CN mailbox is 2. 1G, which can be increased to 10G through the maximum integral. Top anti-virus software kaspersky anti-virus's fourth-generation intelligent anti-spam filtering mobile phone sends and receives emails as a reminder service POP3\SMTP\ Multi-protocol email sending and receiving can keep the original free email user name and directly upgrade the economic email.

sohu postbox

Sohu Mailbox is a well-known brand of China Mailbox, which provides Sohu free mailbox service, 4G super space and supports a single super 10M attachment. A powerful anti-spam system filters nearly 98% spam to you.

QQ mail

Tencent mailbox, unlimited capacity, maximum attachment 50M, support for POP3, safe mode, built-in WebQQ, reading space, etc.

gmail

Gmail mailbox reduces spam. Google's innovative technology can keep spam out of the inbox. Oversized space exceeding 7397.6 15554 MB (and increasing) available storage space.

139 mailbox

Free: the mailbox of China Mobile 139 is free of service charge. Mobile transceiver terminals send and receive emails anytime and anywhere through SMS, MMS and wap. The mobile phone number is the email name! Unlimited capacity, send 1G network disk capacity. Cooperate with Sophos to provide anti-virus security protection; Powerful anti-spam system, effectively shielding spam; There is no need to register 139 email, which corresponds to the mobile phone number. Mobile phones send and receive e-mails.

Hotmail mailbox

Microsoft's email address. 5 GB super storage capacity. Can be increased indefinitely. New design: choose your favorite color and layout. Starting from the familiar classic version, you can switch to the full version at any time to use the advanced security features provided by Microsoft. Patented Microsoft SmartScreen technology can help users protect their inboxes from spam and viruses. Quickly check whether the email is suspicious, click to completely delete the spam, powerful virus scanning and clearing function, with the appearance and function of Outlook, preview the email in the reading pane, drag and drop the organization function, and be able to chat online in the mailbox. Large capacity 25 GB Skydrive.

2980 mailbox

2980 E-mail is the website product of Duoyi Network, which is dedicated to creating professional and safe free E-mail. 2980 mailbox was released on June 20 10, which integrates professional game service, mobile phone number login, super mailbox management, mailbox black/white list setting, points redemption and other mailbox functions. The following is a complete set of corporate mailboxes used by domestic corporate users. The listed service providers are ranked in no particular order.

Sanwu interconnection

Xiamen Sanwu Internet (China Channel) is a listed company on the Growth Enterprise Market, with a capacity of 3.5G It has two post offices and a 64-bit anti-spam system, accounting for about 20% of the domestic enterprise post office market.

263 mailbox

263 mailbox is the only independent mail portal, focusing on mail operation experts. The only dedicated carrier-grade IDC, real North-South interworking and overseas forwarding. The only national 863 program anti-spam eavesdropping gateway, six national patents. The only top email antivirus engine, defending against email trojans. The only national patent, 500M- 1G super-large accessories to send! The only fax mail, unlimited business communication!

China resources

Xiamen Huarun, a famous trademark in Fujian Province, is a rookie of enterprise post office, with unlimited mailbox capacity and powerful 8-line post office. It has realized many value-added functions, such as mobile phone mailbox, SMS reminder, email fax sending and receiving, instant messaging and so on.

Wang Wan

Wang Wan is a well-known network provider in China with a mailbox capacity of1g.

New network

New Network, New Network Global Mail has upgraded its capacity to 365G.

Netease

Netease, the old brand of post office, initially devoted itself to free and paid personal email service, and began to pay attention to the market development of post office on 20 10.

Microsoft

Microsoft, the post office service of a famous foreign company.

Google

Google, a well-known foreign post office service.

Tencent

Tencent, 20 10 launched the public beta version of QQ enterprise mailbox.

Sina.com

Sina's enterprise mailbox is safe, stable and fast, with ten years' experience in enterprise mailbox operation, a safe and stable system, top international anti-spam engine, excellent overseas communication ability and excellent customer service. In the autumn of 2000, ray Tomlinson studied the existing file transfer program and information program, and developed a new program, which can send and receive information through the computer network without any previous restrictions. In order to make people have easy-to-identify email addresses, Tomlinson decided to use the @ symbol, which is preceded by the user name and followed by the user's email address. E-mail was born. But at that time, only a few hundred users of ARPANET could use email.

In the mid-1980s, with the rise of personal computers, e-mail began to spread widely among computer addicts and college students. 1979 Eric Allman of Berkeley wrote delivermail. 1980, SMTP protocol appeared, and Eric upgraded delivermail to sendmail. It is a packaged product, and there is no "out-of-box authorization" restriction. Sendmail mail system has contributed to the vigorous development of e-mail.

In the mid-1990s, when WWW introduced the first concept of web browser, the number of Internet users around the world surged. With the widespread popularity of the Internet, e-mail services played an increasingly important role in our life, study and work.

1On September 20th, 987, Qian, known as "the first person on the Internet in China", sent China's first e-mail from Beijing to Karlsruhe University in the former Federal Republic of Germany via Italy, with the content of "Crossing the Great Wall and Going to the World". This is the first step for China people on the Internet, and it is also the first step for Yi Meier. This step is no less significant to China netizens than Armstrong's first step on the moon. He pioneered the Internet users in China.

Speaking of the first free mail system designed by China people, we can't help but mention Ding Lei, Chen Leihua and 163net. For China Internet, this is also a landmark event. The first set of free mail system was quickly put up on 163net by Ding Lei for free use by domestic netizens at that time. The first free electronic post office in China was born.

With the birth of the first free e-mail in China, many service providers took a fancy to the development potential of e-mail and started to operate free e-mail services. Sina, Sohu, China and other portals. Com began to set foot in e-mail service, which triggered an e-mail war between portals.

When e-mail service no longer has eye-catching effect, service providers begin to look for new profit growth points. At this time, several websites, such as 2 1cn, 263, 163, have successively launched paid mailboxes on the basis of maintaining their original free user services. Subsequently, Sina, the first portal in China, began to reduce the size of free mailboxes and launched a fee-based service. China's four major portals and two major websites began to announce some fees, which triggered a discussion upsurge of "charging or free".

On March 18, 2002, 263 Capital Online made a surprising move, announcing that it would completely stop providing free services after May 2 1. Many website CEOs and IT critics have commented on this matter. For domestic netizens, it is undoubtedly bad news. Some people commented that the move was too impulsive. Does the free era come to an end because of this landmark event?

In May, 2006, Yahoo launched a 3.5G 20M mailbox, and on June 7th, Netease mailbox was upgraded again and expanded into a 3G 20M mailbox with large capacity and large attachments. In less than a month, the two giants continued to expand mailbox capacity and increase attachment loading. It has brought great shock to the Internet, a large-scale revolutionary movement to the e-mail market and the formation of new standards in the e-mail market.

On September 3, 2007, Netease suddenly announced that it would upgrade all its mail systems on a large scale during Teacher's Day (September 10) and launch unlimited free mailboxes. Not to be outdone by Yahoo, the two giants have also launched unlimited free mailboxes. E-mail competition resurfaced.

The struggle between the two e-mail giants is in full swing, and Teng Xun has also upgraded its QQ mailbox in a low-key way. By June, 2007, QQ's free email address not only expanded to two G's, but also created a unique notepad function, which increased the attachment capacity to an amazing 1 G for the first time through the file transfer station. In connection with the binding with QQ client, the pace of Teng Xun entering the domestic e-mail field is unstoppable. Predictably, e-mail competition will become more and more fierce.

The development of e-mail is like a mirror, which reflects the mentality of network operators and netizens in China during the development of the Internet. In any case, e-mail is becoming more and more popular in people's life, work and study. At the same time, there is a trend to combine various means of communication to become a three-dimensional and all-round communication network. At the same time, e-mail also plays a very important role. It's hard to imagine what life would be like for netizens without e-mail. Let's wish e-mail and a bright tomorrow.