Simple Mail Transfer Protocol Service. Using that store and forward feature mentioned before the message can move in steps from your computer to its destination. Configuring the simple mail transfer protocol server when you configured tcpip the system automatically configured smtp for you.
The simple mail transfer protocol smtp service could not be started. Smtp uses tcp well known port 25. Nmap has so many scripts for simple mail transfer protocol enumeration.
Smtp can both send and receive mail but its bad at queuing incoming messages hence the common.
However you still need to change a few smtp properties to ensure that the smtp server works correctly for e mail. Smtp is a delivery protocol only. In 1982 rfc 821 revised smtp along with rfc 822. Smtp simple mail transfer protocol is a tcpip protocol used in sending and receiving e mail.