SMTP is a standard communication protocol for the transmission of email messages. The mail servers and also some other message transfer agents are using SMTP in order to receive and send the electronic mails. This particular protocol affects the deliverability of the email and thus it supports the email marketing conversions. Here, you can find everything about SMTP, its working, types, and also configuration.
About SMTP Protocol:
Generally, a protocol consists of set of procedures and rules that direct the exchange of data between any two or more numbers of computer devices. There are different types of protocols used between the computers in order to exchange the information or data. They usually set the different set of standard procedures to exchange the data and also establish the communication. The most important internet protocols are HTTPS, SMTP, DNS, and TCP/IP. SMTP (Simple Mail Transfer Protocol) is the best and widely used communication protocol which allows the users on the different or the same computers to send the electronic mails over the web. It probably involves a specific set of guidelines based on the communication requirements through the email takes place.
This simple mail transfer protocol acts as the push protocol by transmitting the electronic mail on and also across the same or different computer networks. It is computer under the TCP/IP transmission protocol application layer where it is working in the format of store & forward. It helps the exchange of electronic mails over the networks. After identifying the related email address, it will send the mail message to one or more numbers of recipients. According to your personal needs and requirements, the users can send your email in the different forms such as graphics, videos, text, links, or anything. If you are considering the components of simple mail transfer protocol (SMTP), there are usually two major components of both SMTP server and SMTP client.
- User Agent (UA)
The user agent component of the SMTP protocol is highly responsible for creating, preparing, and also putting your emails in the format of an envelope which is ready for transmission.
- Mail Transfer Agent (MTA)
When it comes to MTA component of SMTP, it transfers this created message through the web to the specific recipient.
Types of SMTP:
Even you have a very complex system, this SMTP protocol supports by adding the relaying system in this transmission process. With the help of this, more mail transfer agents can be placed at either receiving or sending sides of the network. If required, this relay system will use the gateways to send the emails and work without the necessity of TCP/IP protocols.
There are actually two different types of SMTP protocols available such as,
- End to end
Whenever the system users are considering the end to end type of SMTP protocol, the SMTP client actually begins the communication session in this model whereas the receiver side SMTP responds to the request of the client. This end to end SMTP protocol also helps to send the electronic mails to the servers at the different other companies. By this way, this model acts as the best communication medium between the various companies.
- Store & forward
There is also store and forward model of SMTP protocol available which is completely different from the end to end SMTP protocol. When it comes to store & forward type of SMTP, it is used only within any company which is unlike the end to end SMTP. Once you directly contact the host of the destination, the SMTP server keeps the message to itself until the SMTP client or receiver successfully gets a copy of the message.
Whether you consider any type of transmission over the internet, TCP (Transmission Control Protocol) is the primary connection for communication between the email receiver and email sender. In SMTP, the email sender actually sends the information in the command strings format over this consistent & ordered data stream channel. If you consider SMTP client, it has the initiating agent, transmitter, or sender in order to initiate the communication session. It provides the command strings and also releases the session for related responses given by the SMTP server that involves the receiver or listening agent.