Configuring a ServiceNav Box to use a mail server with authentication

A client or partner does not use an internal mail server and/or its server requires authentication to agree to relay messages. ServiceNav must be configured to use an authenticated SMTP relay.

The client must provide the authentication account and password.

• in the rest of the document we will use user@client.dom  as email address / login and password as password
• in the examples the box (SNB or SNP) will have for hostname hostname
• in the examples the name of the local network will be client.lan

Authentication without encryption

Create the following file : nano /etc/exim4/passwd.client.

Add the authentication line :

Edit /etc/exim4/exim4.conf.template

• Add towards the beginning of the file, after the following lines

The line:

Configure EXIM4 in the traditional way : 

sudo su - cd /root/vsb_installation

./vsb_installation.pl

Then follow the instructions on the screen:

############################################################
 ####### VSB INSTALLATION ########
 ############################################################
 Copyright CoServIT 2012-2013. All rights reserved.

 ## Welcome in the VSB Installation script - VSB/VSM side. ## This tool will allow you to: ## - Configure your network ## - Contact the Vsb Installation API to get your synchronization parameters ## - Configure the mail ## Note : You can exit this program with Ctrl+C

Press any key to continue

Press any key to continue

To skip the ServiceNav Box network configuration: Click Enter

###### NETWORK CONFIGURATION #############

Do you want to configure the Network (y/n) [default: n] :

To skip the "Provider" configuration of the ServiceNav Box: Click Enter

###### CONTACTING INSTALLATION PROVIDER #############

Do you want to retrieve configuration by HTTP/HTTPS api (y/n) [default: n] :

The last step is to configure the sending of emails with the Exim4 email service running on the ServiceNav Box. To configure the sending of notification emails, type "y" and hit the "Enter" key:

###### MAIL CONFIGURATION (EXIM4) #############

Do you want to configure the Mail (y/n) [default: n] : y

--> Launching exim4 config. do not interrupt!

The Exim4 configuration tool launches:

Here's what you need to answer the questions:

Type of configuration :

• • Relay (smarthost) - no local mail

System email name:

• client.dom

List of IP addresses at Exim will be waiting for incoming SMTP connections:

• 127.0.0.1 ; ::1

Other destinations for which email must be accepted:

• (blank)

Domain name visible to local users :

• client.dom

Network name or IP address of the smarthost system :

• realadress::realport

Should DNS queries (connections on demand?) be minimized?

• No

Is it necessary to separate the configuration into several files?

• No

Once the configuration is complete, the service restarts:

* Stopping MTA for restart [ OK ]

* Restarting MTA [ OK ]

--> Exim4 config finished

• Change /etc/email-addresses
  • Add the following lines :
  • nagios: user@client.dom
  • root: user@client.dom
• Change /etc/aliases
  • Change the line for the root user : root: :blackhole:
• Restart exim4

exim4 restart service

Authentication with encryption

This is notably the case for relaying on the Orange ISP's SMTP servers.

Create the following file : nano /etc/exim4/client_smtp_auth.txt

Then add the line :

Replace the entire section entitled remote_smtp_smarthost by the following lines:

remote_smtp_smarthost:
  debug_print = "T: remote_smtp_smarthost for $local_part@$domain".
  driver = smtp
  hosts_require_tls = AUTH_CLIENT_REQUIRE_SSL
  hosts_require_auth = AUTH_CLIENT_REQUIRED

Once the configuration is saved, the exim4 server has to be restarted: exim4 restart service

Check the correct sending of email under telnet

Example below carried out with a mail relay at the Orange ISP.

Dialogue, in bold what to enter:

Locate the IP of the responding mail server, here: 193.252.22.84

Check the correct sending of email under exim4

To test the sending of emails, type the following command adapting it to your needs:

#Mtest method 1
mail -s "Hello World" mail@domaine.com
Cc:
Text


#Mtest method 2