Question Email notification

Hello, I set kunena in intranet and I can write any post, now I want send email when a register users end a new question or comment, I created my register user and kunena sent me the next advertisement:

Mensaje

Su cuenta ha sido creada y se ha enviado un enlace de activación a la dirección de correo electrónico que ha introducido. Antes de poder identificarse como usuario registrado, note que debe verificar la cuenta seleccionando el enlace de verificación que le hemos enviado a su dirección de correo electrónico, y luego un administrador la activará.

The announcement sent me that I have been recived an email notification but I didn't recive it, why I did't recive it?

Could you help me please?

Hello, in my spam folder I found:

The mail system

<This email address is being protected from spambots. You need JavaScript enabled to view it.>: Host or domain name not found. Name service error
for name=dt.xxx.com type=AAAA: Host not found

Part 2:
Content-Description: Delivery report
Content-Type: message/delivery-status

Part 3:
Content-Description: Undelivered Message
Content-Type: message/rfc822


From [email protected]_potencia.xxx.com Thu Nov 30 09:37:54 2017
Return-Path: <[email protected]_potencia.xxx.com>
To: This email address is being protected from spambots. You need JavaScript enabled to view it.
Subject: New User Details
X-PHP-Originating-Script: 0:class.phpmailer.php
Date: Thu, 30 Nov 2017 15:37:54 +0000
From: Depto de Elect <This email address is being protected from spambots. You need JavaScript enabled to view it.>
Reply-To: Hugo <This email address is being protected from spambots. You need JavaScript enabled to view it.>
Content-Type: text/plain; charset=utf-8


Will you have any idea about what is the problem?

Regards.
Xochitl

Lo siento pero estoy un poco confundida, para que los correos de notificacion se envien se debe de instalar un componente o un extensions?

Sorry, I forgot.

My question was, I must use a component or extension in joomla 3.7.4 for receive notifactions?


Thanks a lot.

Thanks a lot.

Regards

looks like the server isn't setup correct. please ask your hoster. Show them the error above.

Thanks a lot for your answer, ok then you said that the above message meaning that I had been made a bad network configuration?

Actually I'm in a INTRANET network, and the server where I'm work don't existe in el DNS server , only I asigned name in the file /etc/hosts , then if I did ping frorm the server then the server reponded by IP and Name, BUT if I did ping for other computer in the INTRANET network then the server only responded by IP not Name.

So, I thing that the solution is: register his name in the DNS, really?

Please could you tell me about the solution please. I did many configuration but the problem continue.

Regards.