WEBVTT 00:08.790 --> 00:14.280 Friends will come back in this search and we're going to learn how to install and configure our own 00:14.370 --> 00:15.510 e-mail server. 00:15.710 --> 00:16.330 OK. 00:16.500 --> 00:22.570 But before actually installing and configuring it to understand how an e-mail server works. 00:22.590 --> 00:23.130 OK. 00:23.490 --> 00:31.500 Mentha in our daily lives we send an e-mail to applications like G-mail Hotmail or bear with applications 00:31.500 --> 00:37.100 like Outlook talking but we don't know what exactly the procedure is going on. 00:37.290 --> 00:37.660 OK. 00:37.680 --> 00:38.650 At the background. 00:38.770 --> 00:41.880 So in this lesson I want to show you the working of an image. 00:41.910 --> 00:47.110 So OK so let's understand this the basic demonstration here. 00:47.220 --> 00:51.120 Suppose there is a client whose e-mail address is Bob. 00:51.150 --> 00:53.170 OK Bob directly mail dot God. 00:53.520 --> 00:59.760 And every user application that we are using for sending and receiving e-mail is called as user agent. 00:59.820 --> 01:00.430 OK. 01:00.540 --> 01:06.150 Whether it is Hotmail or Zeeman such applications are called as User-Agent applications. 01:06.360 --> 01:11.350 And suppose this board wanted to send an email Bombardier D.M. got caught. 01:11.580 --> 01:16.950 So what happens is every moment that is edited gmail dot com. 01:17.190 --> 01:25.510 OK at gmail dot com is a domain so every domain contains and they seem to be OK every moment contains 01:25.510 --> 01:29.190 content this seem to be said were quoted as Mail Transfer Agent. 01:29.420 --> 01:32.550 OK so then the client machine sense. 01:32.710 --> 01:36.150 OK the message comaraderie Jimmer dot com. 01:36.160 --> 01:40.090 Then do a search for the domain here. 01:40.090 --> 01:47.680 So because you belong to the local domain name that is the same type you said was domain name so it 01:47.730 --> 01:50.040 searches for that account. 01:50.110 --> 01:52.360 OK in the local database. 01:52.570 --> 01:55.040 OK and deliver the message to that account. 01:55.050 --> 02:02.940 If Dacca can present it in this way the local mail delivery box local means that email is belonging 02:02.940 --> 02:06.530 to the same domain which decline belongs. 02:06.730 --> 02:14.940 OK and what if the client wanted to send an email to enjoy at hotmail dot com or dot com is another 02:14.940 --> 02:16.150 domain. 02:16.230 --> 02:19.750 So in this case probably DNS was gonna help us. 02:19.900 --> 02:22.280 OK so how are they going to help us. 02:22.290 --> 02:28.950 Because every S-M keep the word is registered to this public DNS so it's OK. 02:29.040 --> 02:34.730 We're going to learn about Hoque install and configure our own DNS servers in the upcoming license. 02:34.800 --> 02:37.060 But for now just understand it recently. 02:37.090 --> 02:38.900 So what is registered there. 02:39.100 --> 02:47.390 OK so the user sends the email to hotmail dot com then the keep sort of mail ticks for the domain. 02:47.400 --> 02:53.190 First it takes for the moment and because the domain is not belonging to G-mail dot com it sends the 02:53.190 --> 02:56.900 request to the public DNS so it's OK. 02:57.120 --> 03:04.590 And then since the public DNS servers and the public DNS servers searches for the IP address of a direct 03:04.590 --> 03:11.790 HOTMAN got caught OK and even the phone the IP address of hotmail dot com this thing that information 03:11.790 --> 03:14.740 back could simply be sort of were of. 03:15.070 --> 03:23.040 OK and as it gets the IP information it establishes the connection would simply be server off hotmail 03:23.040 --> 03:25.910 dot com Enderley was the message. 03:26.520 --> 03:33.870 In this way whenever you want to send an email to other domain which is not belonging to the local domain 03:33.870 --> 03:37.020 then the procedure works in this way. 03:37.320 --> 03:44.700 In this way the SO us who works whenever we want to send or receive any e-mails in our next lesson we're 03:44.700 --> 03:49.390 going to learn how to install and configure our own email server. 03:49.460 --> 03:53.130 Ok and we go in and rescue delete emails. 03:53.220 --> 03:55.370 OK with the help of command line.