Open the IIS Start menu-Run or win+r shortcut key, and then enter "inetmgr" during running and press enter. If there is an error prompt, IIS is not installed or the service is not enabled.
Step two:
Select the name of the computer in the ISS "Connection" column. Select to open the "SMTP Email" function in the home page of the computer.
Just set it according to your own needs. But you must have a unique email address and a fixed IP SMTP server to use it.
SMTP (Simple Mail Transfer Protocol) is a simple mail transfer protocol. It is a set of rules for sending mail from the source address to the destination address, which controls the transmission mode of letters. SMTP protocol belongs to TCP/IP protocol family, which helps each computer find the next destination when sending or transmitting letters. The email can be sent to the recipient's server through the server specified by SMTP protocol, and the whole process only takes a few minutes. SMTP server is an outgoing mail server following SMTP protocol, which is used to send or transmit sent e-mail.