Simple mail Transfer Protocol(SMTP)

Simple Mail Transfer protocol is a send the E-mail inside the network, Mostly more mail send from Internet use Simple Mail Transfer protocol to send massage from server. Generally used to Simple Mail Transfer Protocol is a send the massage from a client to mail server.
An important feature of SMTP is its capability to relay mail across transport service environments. A transport service provides an interprocess communication environment (IPCE). An IPCE may cover one network, several networks, or a subset of a network. It is important to realize that transport systems (or IPCEs) are not one-to-one with networks. A process can communicate directly with another process through any mutually known IPCE. Mail is an application or use of interprocess communication. Mail can be communicated between processes in different IPCEs by relaying through a process connected to two (or more) IPCEs. More specifically, mail can be relayed between hosts on different transport systems by a host on both transport systems.


Simple Mail Transfer Protocol Contents are :-
a,Outgoing mail SMTP server
b,Sample communications
c,Security and spamming
d,Other protocols for e-mail
e,Related Requests For Comments (RFCs)
f, External links .
Simple Mail Transfer Protocol (SMTP) Outgoing Mail Server:-
Simple Mail Transfer Protocol outgoing mail servers support for Yahoo com,com cast, MSN,SBC, Version and Third party Internet Service Providers. When a company is purchased by another company, the POP3 and SMTP server names often change. Simple Mail Transfer Protocol one of th limitations original is that has no facility for authentications of senders. Spam it is enables by several factors.
Client to mail server E-mail is handed off usually using Simple Mail Transfer Protocol, From here is the MSA delivers to mail to an MTA ,running on the same machine.
Simple Mail Transport Protocol Related Requests For Comments(RFCs):-
RFC 1123 – Requirements for Internet Hosts -- Application and Support (STD 3)
RFC 1870 – SMTP Service Extension for Message Size Declaration (оbsoletes: RFC 1653)
RFC 2476 – Message Submission
RFC 2505 – Anti-Spam Recommendations for SMTP MTAs
RFC 2920 – SMTP Service Extension for Command Pipelining
RFC 3030 – SMTP Service Extensions for Transmission of Large and Binary MIME Messages
RFC 3207 – SMTP Service Extension for Secure SMTP over Transport Layer Security
RFC 3461 – SMTP Service Extension for Delivery Status Notifications
RFC 3462 – The Multi part/Report Content Type for the Reporting of Mail System Administrative Messages (obsoletes RFC 1892)
RFC 3463 – Enhanced Status Codes for SMTP (obsoletes RFC 1893 )
RFC 3464 – An Extensible Message Format for Delivery Status Notifications (obsoletes RFC 1894)
RFC 3834 – Recommendations for Automatic Responses to Electronic Mail
RFC 4409 – Message Submission for Mail (obsoletes RFC 2476)
RFC 4952 – Overview and Framework for Internationalized E-mail
RFC 4954 – SMTP Service Extension for Authentication (obsoletes RFC 2554)
RFC 5068 – E-mail Submission Operations: Access and Accountability Requirements (BCP 134)
RFC 5321 – The Simple Mail Transfer Protocol (obsoletes RFC 821 aka STD 10, RFC 974, RFC 1869, RFC 2821)
RFC 5322 – Internet Message Format
Simple Mail Transfer Protocol it is the important protocol for email through sending Internet, The important advantage of Simple Mail Transfer Protocol is that email message are sent more efficiently.