Simple Mail Transfer Protocol (SMTP)
From Computing and Software Wiki
Email protocols are used to meet the requirements of electronic mail users , Simple Mail Transfer Protocol (SMTP) use straight forward and efficient way to transfer mail between hosts, It was first defined in RFC 821, by using simple text method it is relatively simple and reliable protocol . SMTP has two rules sender acts as client it establish a TCP connection with the receiver , which act like a server, even if the sender is a server in case of sending mail it acts as a client . SMTP uses a simple text-based technique in which one or more recipients of mail are defined.
