What are the main contents of commonly used email software? What are SMTP and POP servers? What are their uses?

In fact, every website that provides e-mail service has its own SMTP and POP server address. You can find them carefully when you log on to your email website. If you can't find them, you can also check the Help on the website. If you want to know more about this, please take a look at the following explanation:

POP (post office protocol) post office protocol POP is a communication protocol on the Internet, and its main function is to send e-mail. When we send a letter to another person, that person may not be online at that time, so the mail server must keep the letter for the recipient until the recipient checks it. When the receiver receives the mail, it must obtain the mail through the POP communication protocol.

At the same time as POP, there is SMTP, which is also used to transmit e-mail on the network. The difference is that POP is the communication protocol responsible for mail programs and mail servers, while SMTP is the communication protocol responsible for sending letters between mail servers.

SMTP (Simple Mail Transfer Protocol) Simple Mail Transfer Communication Protocol SMTP is a communication protocol on the Internet, and its main function is to send e-mail. When we send an e-mail to another person through an e-mail program, we must send the e-mail to the other person's mail server through SMTP communication protocol. When the other person is online, we can receive your letter.

In fact, simply speaking, the POP server is used to receive emails, and generally there is only one E_mail address. If you want to receive letters from multiple mailboxes at the same time, you must set the POP3 server address of each mailbox one by one. Don't tell me I can't find it. I'll tell you a little trick: after you apply for a free email, take a closer look at its help file and you'll usually find it. As for SMTP servers, it can be understood that they are used to send letters, and most SMTP servers are also free. In other words, whether you have an email address or not, you can send letters by filling in an SMTP server. If you use Outlook Express or other mail programs to send letters and have multiple free mailboxes at the same time, you don't need to set up multiple SMTP servers, just choose one to fill in. For example, the server provided by Sina Mail is smtp.sina.com.cn.