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Simple Mail Transfer Protocol
A brief description of SMTP
There is a guide for using everything. A certain set of rules. And so does THE INTERNET. Simple Mail Transfer Protocol (SMTP) is an Internet Norm for transferring Electonic Mail (E-mail). It was first conceptualized by Request For Comments (RFC). Request for Comments (RFC) is a form of publication from the Internet Engineering Task Force (IETF) and the Internet Society (ISOC), the primary technical development and standards-setting bodies for the Internet.
In laymen language, SMTP is simple decorum that is followed by emails for transmission through out the internet. In more plain terms, SMTP can be considered as a post office where sender deposits their email and it delivers to the receiver’s local post office i.e. another SMTP server.
A Quick Look Into The Past
It was first defined by RFC 821 in 1982, but the latest update was done in 2008 by RFC 5321. The latest SMTP was edited with Extended SMTP also known as Enhanced SMTP (ESMTP). It is a definition of protocol extensions to the Simple Mail Transfer Protocol standard. The Extension format was defined in IETF publication RFC 1869 in November 1995 which established a basic structure for all existing and future extensions.
All About Flaws
Although email servers and other mail transfer agents use SMTP for sending and receiving emails, consumer mail applications typically use SMTP only for sending messages to a mail server for Relaying. And to retrieve messages, consumer mail applications usually use either POP3 or IMAP.
SMTP is a delivery protocol only. Other protocols, such as the Post Office Protocol (POP) and the Internet Message Access Protocol (IMAP) are specifically designed to retrieve messages by individual users and managing mail boxes.
All The Things You Need For Smtp Configuration
Server host address is required to authenticate users or tools for sending outgoing messages using your email address.
A port number is a way to identify a specific process to which the Internet or other network message is to be forwarded when it arrives at a server.
Email encryption is encryption of email messages to protect the content from being read by other entities than the intended recipients.
Email Clients And Their Smtp Settings
The Evolution Of Ports
A Port is an end point of communication in an operating system. It identifies a particular process or a type of network services. A port is always associated with an IP address and the protocol type of the communication, and thus completes the destination or origination network address of a communication session.
A port is identified for each address and protocol by a 16-bit number, commonly known as the port number. For example, an address may be “protocol: TCP, IP address: 220.127.116.11, port number: 80”, which may be written 18.104.22.168:80 when the protocol is known from context. Specific port numbers are often used to identify specific services.
And there are four major port numbers that identify SMTP process. They are 25, 465, 587 and 2525.
Complete Picture Of Tls And Ssl
Secure Sockets Layer (SSL), is a cryptographic protocol that provides communications security over a computer network. SSL, now, is known as Transport Layer Security. The Transport Layer Security protocol aims primarily to provide privacy and data integrity between two communicating computer applications.
The TLS protocol comprises two layers: the TLS record protocol and the TLS handshake protocol.
TLS is a proposed Internet Engineering Task Force (IETF) standard, first defined in 1999 and updated in RFC 5246 (August 2008) and RFC 6176 (March 2011). It builds on the earlier SSL specifications (1994, 1995, 1996) developed by Netscape Communications for adding the HTTPS protocol to their Navigator web browser.