Why is the e-mail message lost or returned?

Although e-mail is usually reliable, there are sometimes problems, such as finding that your mail is being returned, Or simply lost on the road. And the user is generally no way to know what's wrong with his mail, it will take some time or even a few days to find out that the letter did not come up to him. The reasons for this are as follows: 1. The wrong delivery address is divided into two situations, one is the user to a non-existent e-mail address ( There is no host or user specified in the address to send an email, then he will receive a simple message, Tell him what's going on. The user will just have to correct it and then send it again. Another situation is the use of a wrong address, which may be the cause of the disappearance of the most annoying one of the reasons for the message. In particular, like CompuServe users, the e-mail address is expressed in numbers, such as: 22737.3322 @compuserve. com, the user may have accidentally lost it to 27737.3322@compuserve.com, So the message was sent to a real-name user named 27737.3322. This will not send the letter to the intended addressee, the sender did not know what had happened. The solution is to be careful when entering addresses. 2. The letter is too long, the message may pass through many transit points before reaching the destination, the mail transfer program on these machines will The length of a certain limit. The most common approach to a message that is too long is to lose it. So if a user wants to send a long letter or use e-mail to transmit data, it is safe to divide it into smaller parts. Limit each message length to 30-40kb, preferably not over 100kb.3. Technical reasons, there are many on the Internet Many computers and communications equipment are continuously serving us, many of these devices will inevitably appear in the long-term operation of some problems, mail server is no exception, such as hard disk failure, power off, system crashes, backup loss, as well as network equipment failure, remote machine shutdown, May cause the loss of e-mail. There is no alternative to this problem, I had to send the letter again. (Editor: ZHAOHB) to force (0 votes) (0 votes) of the nonsense (0 Votes) Professional (0 Votes) The title of the party (0 Votes) passed (0 Votes) Text: Why the e-mail sent will be lost or returned? Back to network security home