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Hey everyone and welcome back. So in the beginning of this skill we mentioned about the different

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components that were available to us with respect to our email and we discussed that

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when we have some type of email on a server we can remotely access this information as the

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client either by making a pop request a pop three request to be exact which will give us a copy of

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that email on our local machine or alternatively we could use iMac to ultimately read the emails

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directly from the server so whilst SMTP is super super important with respect to email of course

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without SMTP there would be no email having the ability to access this email via imap or via pop

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three is obviously very very important so what I want to do is to show you two different servers

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that we can use that can actually implement this functionality and these are the two servers we have

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to be aware of as well as their basic configuration files for the lpik 2 examination now the very

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first one is called a courier server now the courier server can actually act as an SMTP server

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but the reality is it also allows us to use pop three as well as imap so clearly this is very very

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flexible and by default you are not going to have this on your system the way you can install this is

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by saying sudo apt install courier and you can do dash pop to receive the pop related packages type in

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my password and we begin installation with why I will just say no for now and okay and okay to generate

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my certificates and to get our imap functionality we just say courier hyphen imap and hit enter and

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that is also being installed now the first file we want to be looking at is one within the Etsy

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directory is in the courier folder and this file will be called auth daemon RC this one right here

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so if we go into this folder if we scroll on down we actually see this value here daemon's equals

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five this just effectively allows us to denote how many processes are going to be available right

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now we have five set but of course you can modify this behavior also what we want to be aware of

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are these settings right here see this here this is something that would be useful to remember for

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the examination we have our debug login settings when the value is set to zero we can see debugging

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has been turned off if we set the value to one the debugging is now turned on and if we set the value

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to two the debugging is turned on and we also have password logging so really the way you actually

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invoke this behavior is just like you have seen so many times before within Linux configuration files

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these hashtags or pound signs as you make all them all you have to do is to delete them to

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ultimately uncomment out that line and suddenly right now my debugging is turned off if I put

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this back and take out this one debugging is now turned on now with respect to pop three and let me

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just put this back on again with respect to pop three and iMap courier has two different configuration

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files so if we go into etsy courier do an ls notice we have a pop 3d file this is the configuration

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file for pop three so if i say pop 3d if i scroll on down we can see the maximum number of daemons

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these are the servers that are being started if we scroll on down a little bit further a very

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important configuration is this one right here we can see the address equals zero now this just

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means that we are going to listen on all ip addresses configured on all interfaces on our

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server and we can actually see here zero means all ip addresses this just means listen absolutely

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everywhere for any connections relating to this service and you'll notice with respect to pop three

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that the default port happens to be 110 and this actually is the configuration right here now if we

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happen to be using this service and we happen to have some type of client configuration maybe we

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wanted to integrate with something like say a thunderbird email client we want to actually

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provide information relating to our mail directory path so what i would do is i would actually specify

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my path which if you recall i'm using home ipv zero and then it would be the mail directory and

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within this i have my inbox so i would save this perfect and similarly for iMap i would go into iMap

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and the same type of things apply we see the address equals zero this is to listen on all

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ip addresses the port for iMap is by default 143 and similarly down the bottom the mail path

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dir we would just configure it to point to whatever mail directory we had we have mail inbox in my

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configuration so i would write this and ultimately i would have to restart my services so i would say

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service courier pop restart and for iMap i would say iMap to restart those configuration files so

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those are the basic configurations that we have to be aware of for the lpik 2 examination with

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respect to courier the next tool that we can install is a dovecott server so dovecott is a

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little bit newer again it also supports iMap and pop three it also allows us to use different types

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of mail boxes so we can use our mail dir style as well as our inbox method so what i will say is

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sido apt install dovecott and i will say iMap d and if i can spell that right there we go as well

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as dovecott pop 3d so if i hit enter i will say yes and the installation will complete okay so if

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i go into the etsy directory and then into dovecott if i do an ls you'll notice that we have this

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configuration file dovecott.conf this was the main configuration file but in more modern implementations

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we happen to be managing this configuration via a conf.d directory which is a very familiar concept

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by now if we go into conf.d if we do an ls so within here we can see things like the iMap.conf

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configuration file which you can use to modify your iMap configurations or alternatively you could

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go into your pop 3 configuration file to modify the pop 3 configurations but one cool feature we

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have with dovecott is as opposed to having to sift through these configuration files you can

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actually just issue the command dovecott-n which will give you a nice display of those

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configurations that are actually taking effect so if i say enter we can actually see right here

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our dovecott configurations so we can see some basics such as our inbox we can have drafts we

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can have junk our sent messages and our trash our protocols here could be iMap and pop 3 we have our

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ssl certificates here but really you can go into much much more detail with respect to courier

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and with dovecot but for the purposes of the examination what we want to be aware of are

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what these tools actually do that are going to allow us to enjoy pop 3 or iMap capabilities to

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retrieve the delivery of our email from remote servers we want to be aware of our basic configuration

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files what they are and particularly their location as well as some of those basic configuration

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settings such as our address setting or port setting so on so forth but for now that is us for

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our introduction into email i hope this has been informative for you and i'd like to thank you for viewing