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Sending emails with a SMTP protocol.



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Hello, everyone.



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Today, I want to talk specifically about the asymptotic protocol and explain in what is basically used



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as a part of sending emails from the receiver to the sender.



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So the Assante protocol is in general use in order to transmit messages from the origin or which is



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the sender to the destination, which usually is the receiver.



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And it is basically used to transmit messages to the mail services.



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So what would usually happen is that you would send your message to the mail service and from the mail



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service, it is going to be transmitted to the sender.



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Also the A.S.A.P. Protocol USB Port 25 in order to send interest me this email messages.



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But about this later, as you're going to see specifically what port types who are using when using



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the same type protocol.



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So what would usually happen is that the connection between the client and the server is first going



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to be established.



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And the first message or the starting message is going to be send it to the server and the connection



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will be started through the port.



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Twenty five.



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The server then would accept the connection or reject it.



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But in most of the cases, separate if everything's OK and it will send back the Esswein acknowledged



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message or it will basically say, OK, your message has been received by me.



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So you can see this action on the picture here.



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And this is a client and this is a server.



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So as you can see, firstly, um, the s why end messages, send it to the server and then the server



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since the acknowledged message back to our client.



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So here it comes, the interesting part.



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And here again from the server, we were sending a message with identifier two hundred and twenty.



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And this means that the server is ready to carry the transmission of the messages that are provided



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from the client.



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So after that, the client can finally provide the message that, for example, says hello here and



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hello means that, um, we are ready to read the message.



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And finally, um, when we reach the final stage, this means we're absolutely ready for the server



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connection.



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So this is basically how the messages between the client and the server are exchanged with the port.



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Twenty five.



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And obviously we're going to take that later.



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So please save this chart in your mind, because this is in a very simple way, um, the normal practice



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for exchanging messages between your computer yourself and the server.



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And no matter what you add it into, just making sure there are pictures or attachments and so on.



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The protocol and the way that the messages are going to be exchanged between the client and the server



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are all going to be the same.



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So that said, guys, thanks for watching this video for the SMTP protocol.



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And in the next one, I am going to talk specifically about the SMTP library with which we are going



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to actually start writing our code.



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Thanks for watching.