OK, i have put in /etc/aliases:
/root:           cosmin.ne...@omnilogic.ro, \root/

The email account in Thunderbird has outgoing smtp server: mail2.omnilogic.ro:25 Also Lyle Giese gave me some more tips on how to configure /etc/postfix/main. This is how postfix are configured now:

/etc/postfix/main.cfg: //everything else is left unchanged.
/myhostname = mail2.omnilogic.ro
//mydomain = omnilogic.ro/
/myorigin = $mydomain/
/mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
smtp_sasl_auth_enable = yes
smtp_sasl_security_options =
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
transport_maps = hash:/etc/postfix/transport/
/relayhost =/


/etc/postfix/transport
/omnilogic.ro      :
.omnilogic.ro     :
*                smtp:[mail2.omnilogic.ro]:25/

/etc/postfix/sasl_passwd:
/webmail.omnilogic.ro    cosmin.ne...@omnilogic.ro:***//
/
I have attached the 2 configs that i thing is relevant to Nagios host/service configurations.

And regarding your last advice, i have no clue on how to configure my email client to check the email account on the nagios machine...don't i need a mail server on nagios machine for that?

So...can anyone tell me what is missing, or point me to some step-by-step documentation?



***************************************************************************
Just before pressing SEND, Lyle gave me some more hints, and now it working, i can receive mails.
These line needed to be added in /etc/postfix/transport:
mail2.omnilogic.ro      :
.mail2.omnilogic.ro     :
*             smtp:[mail2.omnilogic.ro]:25

Thank allot Lyle


Michael Saldivar wrote:
On Tue, Nov 17, 2009 at 2:36 AM, Cosmin Neagu <cosmin.ne...@omnilogic.ro <mailto:cosmin.ne...@omnilogic.ro>> wrote:

    Hello everybody,
     From what i see from commands.cfg, by default it tries to send email
    with: /usr/bin/mail -s.
    But the email ends up in a local folder /var/mail/cosmin.
    Can anyone help me with some documentation or some advice on how can i
    make nagios send emails?
    Thanks.


Looks like it is sending mail, and that mail is being delivered locally. When you configured Nagios to send e-mail, what e-mail address did you tell it to send to?

Also, look for a file called /etc/aliases. Open it, and see if there is a line like:

root:          cosmin

The name on the left may match the e-mail address you gave nagios, and the aliases file is re-directing that mail to the local user cosmin. Replace cosmin with an e-mail address on a different domain. Or modify Nagios to send to a an e-mail address on a domain different than the local machine. Or configure the e-mail client on your computer to check the e-mail account on your Nagios machine.

--
Mike
define contactgroup{
        contactgroup_name               Monitorizare
        alias                           Grup de monitorizare Omnilogic
        members                         EmailCosmin
}
define contact{
        contact_name                    EmailCosmin
        alias                           Cosmin Neagu Email
        contactgroups                   Monitorizare
        host_notifications_enabled      1
        service_notifications_enabled   1
        host_notification_period        AllTime
        service_notification_period     AllTime
        host_notification_options       d,u,r
        service_notification_options    w,u,c,r
        host_notification_commands      notify-host-by-email
        service_notification_commands   notify-service-by-email
        email                           cosmin.ne...@omnilogic.ro
}
define host{
        host_name               Cosmin
        alias                   CosminLaptopDell
        address                 192.168.53.151
        check_command           check-host-alive
        max_check_attempts      3
        check_period            AllTime
        contacts                EmailCosmin
        contact_groups          Monitorizare
        notification_interval   30
        notification_period     AllTime
        
}
define service{
        host_name                       Cosmin
        service_description             HTTP
        check_command                   check_http
        notifications_enabled           1
        notification_options            w,u,c,r,f,s
        max_check_attempts              5
        check_interval                  5       ;minutes
        retry_interval                  3
        check_period                    AllTime
        notification_interval           30      ;minutes
        notification_period             AllTime
        contacts                        EmailCosmin
        contact_groups                  Monitorizare
}
define service{
        host_name                       Cosmin
        service_description             SSH
        check_command                   check_ssh
        notifications_enabled           1
        notification_options            w,u,c,r,f,s
        max_check_attempts              5
        check_interval                  5       ;minutes
        retry_interval                  3
        check_period                    AllTime
        notification_interval           30      ;minutes
        notification_period             AllTime
        contacts                        EmailCosmin
        contact_groups                  Monitorizare
}
define timeperiod{
        timeperiod_name                 AllTime
        alias                           All the time
        sunday                  00:00-24:00             ; Every Sunday of every 
week
        monday                  00:00-24:00             ; Every Monday of every 
week
        tuesday                 00:00-24:00             ; Every Tuesday of 
every week
        wednesday               00:00-24:00             ; Every Wednesday of 
every week
        thursday                00:00-24:00             ; Every Thursday of 
every week
        friday                  00:00-24:00             ; Every Friday of every 
week
        saturday                00:00-24:00             ; Every Saturday of 
every week
}


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