What are the similarities and differences between e-mail and traditional postal letters?

* * * Similarity: both are used for information transmission of letters and articles.

Difference:

1, different in nature: E-mail is a communication method that provides information exchange electronically and is the most widely used service on the Internet. The traditional mailbox is a receiving facility set up by the postal department at roadside and public places, which is used to accept mail sent by the public, especially public mailboxes.

2. Use time is different: 1969 10 The first e-mail in the world was a short message sent to colleagues by computer scientist Professor Leonard K. From 65438 to 0969, posting boxes were widely used in China.

3. Different features: SMTP for sending e-mail is a protocol that maintains the transmission order and specifies what work should be done between mail servers, with the goal of transmitting e-mail reliably and efficiently. SMTP is independent of the delivery subsystem and can relay messages. Mailbox embodies a way of identification, a sign of ownership.

Extended data:

Precautions:

1. The email title and body cannot be empty or too short. If there is only one meaningless character or hi/hello/, the title should not be too long to avoid being mistakenly blocked as spam by the mail receiving system.

2. The number of recipients (including cc) sent each time should not exceed 65,438+000. If it exceeds, please send another email.

3. If you don't need some mail recipients to reply to your mail, please put them on the CC list.

4. Don't send what can be clearly stated in the body of the email as an attachment.

5. When replying to the email, the quotation should not be too long, which is not convenient for collection and reading.

6. For multiple attachments, try to compress files in zip format instead of rar format, which is more general.

Baidu encyclopedia-mailbox

Baidu encyclopedia-E-mail