Nagios - Centreon Erreur de mail

Bonjour,

J'ai un soucis sur centreon, lorsque je veux enregistrer la configuration inscrite dans centreon sur nagios:

Nagios Core 3.3.1
Copyright (c) 2009-2011 Nagios Core Development Team and Community Contributors
Copyright (c) 1999-2009 Ethan Galstad
Last Modified: 07-25-2011 - License: GPL

Reading configuration data...
Read main config file okay...
Read object config files okay...

Running pre-flight check on configuration data...

Checking services...
Checked 4 services.
Checking hosts...
Checked 1 hosts.
Checking host groups...
Checked 1 host groups.
Checking service groups...
Checked 0 service groups.
Checking contacts...

Error Contact 'Mail CENTREON' has no service notification commands defined!
Error Contact 'Mail CENTREON' has no host notification commands defined!
Warning Contact 'Mail CENTREON' has no service notification time period defined!
Warning Contact 'Mail CENTREON' has no host notification time period defined!

Checked 2 contacts.
Checking contact groups...
Checked 1 contact groups.
Checking service escalations...
Checked 0 service escalations.
Checking service dependencies...
Checked 0 service dependencies.
Checking host escalations...
Checked 0 host escalations.
Checking host dependencies...
Checked 0 host dependencies.
Checking commands...
Checked 54 commands.
Checking time periods...
Checked 5 time periods.
Checking for circular paths between hosts...
Checking for circular host and service dependencies...
Checking global event handlers...
Checking obsessive compulsive processor commands...
Checking misc settings...

Total Warnings: 2
Total Errors: 2

***> One or more problems was encountered while running the pre-flight check...

Check your configuration file(s) to ensure that they contain valid
directives and data defintions. If you are upgrading from a previous
version of Nagios, you should be aware that some variables/definitions
may have been removed or modified in this version. Make sure to read
the HTML documentation regarding the config files, as well as the
'Whats New' section to find out what has changed.

---------------

Je cherche donc à corriger le problème de mail.
Je connais pas grand chose à linux, deux trois bases de l'école :D

Enfin bref, il faut que je renseigne un vrais MAIL pour que je puisse recevoir les alertes convenablement.

Faut-il un serveur de mail etc....

Je connais bien l'administration informatique mais pas le monde linux.

Donc je suis pas trop noobs :D