电子邮件系统升级后主要增加功能（The email system upgrades primarily to add functionality）

电子邮件系统升级后主要增加功能（The email system upgrades primarily to add functionality） 电子邮件系统升级后主要增加功能(The email system upgrades primarily to add functionality) The email system upgrades primarily to add functionality I.1 mail tracking module The module allows the sender with this permission to track the state of the letter sent. Has the recipient received timely or effective reading of this letter or deleted it after reading it?. The sender can remotely obtain the information and communicate with the addressee in time according to the change of the status of the letter and the notification of the event. For example, a department unit emergency release meeting notification message tracking module through the unique email system of letters, the sender can know what are the recipients did not read the message, and decided to adopt other means of communication and contact the recipient. The recipient who has read the letter does not need further notice. This greatly improves the working pressure and workload of the group mail system management personnel. And make the management work have accurate pertinence. The function in the actual application process has won the praise of the vast number of users. Automatic switch between I.2 mail attachments and network storage files In the daily mail processing, mail attachments should be stored in the network storage, network hard disk space, require customers to download by attachment to the PC machine, and then the two operation by the PC machine again uploaded to the network, the network disk storage. This kind of operation has no problem from the business logic, but it is a waste of the limited network bandwidth. At the same time, it also makes the user's product experience worse. The system allows users to email attachments directly uploaded to the network storage space, At the same time, files that have been uploaded to the network storage can be directly sent to the attachments of the new mail. Greatly simplifies the end user's operation and reduces the occupation of network bandwidth. In the realization of the product details make the customer experience is particularly smooth. I.3 mail in multiple attachments. In the actual use of the user, a large proportion of mail contains multiple attachments. At this point, the traditional mail system often uses one click to select the way to save to the local. It makes it very unnecessary for users to repeat more work. After collecting the first hand user feedback, we actively organize research and development to complete a key click to complete multi attachments packaging after a download function, the function is small, but it has been widely praised by users! I.4 multi mail direct forwarding We often encounter to transmit multiple emails to the same recipient, and most of the mail system can take every message one by one forward, fill in the recipient after sending the repeated work of the user are many and very unnecessary. Email system allows the user to mail home and check a number of letters were forwarded, the recipient will receive a letter containing multiple.Eml format attachments. The recipient can click on each.Eml attachment to view the mail. Greatly simplifies the sender's labor complexity, and convenient for the recipient to view! I.5 sends e-mail to prompt the user to save the recipient When a user writes a letter in WEB, if the recipient's address is not in the personal address book, At this point, the system will prompt if the user is saved to the address book. As shown in figure IV.1-17 When I.6 sends an email, it matches it from the address book When the user writes the message in WEB, the recipient address matches from the personal address book. For example, the input Lin system displays all the user addresses that start with Lin. As shown in figure I.7-1 I.7 sends timed mail When the user needs in a period of time when sending mail, can be completed through regular mail, edited email selection timing set up to send mail, send time on the line, the system will record the mail at regular e-mail setup time after sending out. Such as Tutu I.8-1 I.8 password recovery function Mail system is generally centralized management deployment, so the mail system administrator will be faced with the vast number of mail users a variety of service requests. For example, staff members forget passwords and other similar problems require mail system administrators to help, it will greatly increase the workload of the mail system management staff. To a certain extent, it also makes valuable office time wasted by unnecessary operation. Provided by email system user password function, the user with the lost password question and registration information can retrieve the password: system to ensure user safety information, set the custom service, the user password, by answering the question and answer, you can change the password, continue to use their own mail. I.9 writes email timeout settings and automatically saves mail in editing When the user in WEB letters, the system according to the administrator to set the timeout, for users to write letters when the countdown reminder, as shown in the figure, the user can according to the system timely reminder, save and send letters. According to the user's application habits, the timeout can be set up by the administrator. When the user writes email page and then click send [expired if] or [Save Draft], the system will prompt the user whether to send the letter content to the clipboard, if users choose to save, when users log in again, can be directly in the email to paste on page. I.10 user address book lookup function The new mail system relaxes the number of personal address books that all users can add, and also refines the address added by each user and the information integrity of the address account. Users can set the name of the user's address, mobile phone, company, position, ICQ and other information through the page. Perfect user information. Facilitate the late management of all accounts and information maintenance. As shown in fig.: Fig. I.11-1 I.11 fully unified coding format UTF-8 To nearly 7 years of operating experience in the mail system based on ASCII, because of that character is very limited, on the basis of various countries or regions to propose its own character set. For example, in China, a very wide range of "simplified", "traditional" two fonts, "simplified Chinese" to take the GB2312 encoding format, and "traditional Chinese" to take the GBK encoding format. After the reform in mainland China, simplified Chinese was adopted", Hong Kong, Macao and Taiwan retain the simplified traditional Chinese characters. But these sets of characters are not compatible with each other, and the same numbers may represent different characters, causing trouble for information communication. And more and more problems that e-mail can not decode and can not browse normally. For example, mutual communication between multinational enterprises and international well-known university academic personnel file transfer, after going abroad and domestic normal mail communication and so on will produce unexpected decoding failure, and these conditions for non mail system professionals cannot solve, only to again contact each other by different e-mail systems can try to send again normal display to deal with, but this operation will undoubtedly lead to important mail users / emergency events cannot be timely treatment. To some extent, it has an impact on the normal life and work order of both sides. In recent years, with the international business more and more, UTF-8 (UCS Transformation Format -8) encoding is a widely used encoding, the encoding is committed to the global language into a unified encoding format. UTF-8 has the following characteristics: The 1. UCS character U+0000 to U+007F (ASCII) is encoded as byte 0x00 to 0x7F (ASCII compatible). This means that files containing only 7 bits of ASCII characters are the same in ASCII and UTF-8 two encoding methods. 2. all UCS characters of >U+007F are encoded as a string of multiple bytes, each of which has a tagged bit set. Therefore, ASCII bytes (0x00-0x7F) cannot be used as part of any other character. 3. the first byte of a multi byte string that represents non ASCII characters is always in the range of 0xC0 to 0xFD, and points out how many bytes the character contains. The remaining bytes of the multi byte string are in the range of 0x80 to 0xBF. This makes resynchronization very easy, and makes coding borderless, and is rarely affected by missing bytes. 4. can be incorporated into all possible 231 UCS codes The 5. UTF-8 encoded character can theoretically be up to 6 bytes long, whereas the 16 bit BMP character is up to 3 bytes long. The sequence of 6. Bigendian UCS-4 byte strings is predetermined. 7. bytes 0xFE and 0xFF have never been used in UTF-8 encoding. Email system is UTF-8 encoding format to adopt international standards for web interface is a fundamental solution to the problem of decoding letters that have long plagued each mail vendor. I.12 list customization As shown in figure 1.7-1 for the "custom mailing list" interface in the interface, the user can select "Customize" or "unsubscribe" mailing list. 1.7-1