What is a mail server?

The mail server is a device used to manage the sending and receiving of emails. It is also the core content of the email system; its only purpose is to serve as a virtual post office.

The mail server is an SMTP server for sending mail and a POP3 server for receiving mail, which work together and provide users with the function of receiving mail. It is more secure and efficient than free email on the Internet, so it has always been a must-have device for enterprise companies.

Mail is operated by separate server software, respectively for sending and receiving. In order to send and receive emails, servers with multiple roles work together. The email server is divided into an SMTP server for email delivery/transmission and a POP3 server responsible for email reception. In addition, in order to establish the mail delivery mechanism, the IP address corresponding to the address on the Internet of the destination mail server (SMTP server) is determined based on the mail address domain name. Of course, a DNS server is required. These servers play an important role and set up the mail system, for example, if you are using web mail, you have to link the web server further.

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