How do China mail servers find each other on the Internet?

March 23, 2017

When you send an e-mail from your local computer to China mail servers, your e-mail has just started its journey to your recipient.

 Maybe your receiver is on the other side of the world, and then it’s a long distance that the e-mail has to travel before it arrives to your received computer.


Before the mail server that your e-mail program communicates with knows where to deliver the e-mail message it’ll examine the e-mail address that you’ve specified as a receiver of the message. The mail server will extract the domain of the e-mail address and use it to locate the mail server that your receiver’s client computer communicates with. The domain is found after the “@” character in an e-mail address.

For example, the e-mail address is, the domain name is By using this domain name as an address the mail server will find which mail server on the Internet to deliver the e-mail message to. When the dedicated servers China have been identified and it’s responded that’ll accept an e-mail delivery, the e-mail is sent to this server. And next time your receiver logs on to the POP3 server via her/his client computer, your email will be downloaded to the person’s e-mail program. This process will take a few seconds, but if the mail servers or Internet have a lot of traffic at that moment it can take more time.


This was a simplified description of how e-mails are delivered through the Internet. If you want to have a more detailed description, then click on the links in the information box The SMTP & POP3 protocol below.

What is IMAP4?

You may have seen the acronym IMAP4 before and wonder: what is it? IMAP4 is a further development of the POP3 protocol and is used to read e-mail from mail servers. IMAP4 isn’t used as much as POP3, but many modern mail servers have support for IMAP4 – acronym for Internet Message Access Protocol version 4.

How can my e-mail program find right mail server on the Internet?


When you start your mail program for the first time, you have to enter e-mail account information before you can use the program. You have to specify the name of a server for outgoing e-mail and the name of China dedicated servers for incoming e-mail. It is here you specify which SMTP server and which POP3 server that your mail program will communicate with others over the Internet. The servers can be located anywhere, but they are usually located in same country as your user computer.