A process which transfers mail in cooperation with a receiver-MTP process. It initiates MTP commands, receives replies, and governs the transfer of mail. In addition, a recipient of computer mail. In addition, mail is sent over the control connection. The control connection is used for the transfer of commands which describe the functions to be performed, the replies to commands, as well as the actual transfer of mail.
Mail is transferred only via the control connection.
It may be necessary to perform certain transformations on the mail because data storage representations in the two systems are different. The receiver converts the data from the standard form to its own internal form. In accordance with this standard, the sequence should be used to denote the end of a line of text. The mail in MTP has no internal structure and is considered to be a continuous sequence of data octets. The MTP commands define the mail transfer or the mail system function requested by the user.