How to configure a mail server to send nagios notifications

[Jessuzz94]

Im using CentOS and i want to configure postfix or sendmail to send notifications with a gmail account. Where i can find some tutorial? Thanks

[jdalrymple]

Using Postfix or Sendmail to relay through Gmail is tricky. It's easier to just send straight to your mail relay from Nagios.

These are the appropriate instructions:

https://exchange.nagios.org/directory/A ... on/details

[Jessuzz94]

The tutorial said:

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Testing: 
Go into Nagios and send an alert and check the /var/log/sendEmail log file. It should say "Email was sent successfully". 

it means that one email account is sent to another email account?

[Jessuzz94]

And the notifications is sending to the email account that i putted in contacts.cfg?

[jdalrymple]

it means that one email account is sent to another email account?

More accurately - it means that the sendEmail program sent mail to an email account.

And the notifications is sending to the email account that i putted in contacts.cfg?

That is how it's supposed to work.

[Jessuzz94]

And the notifications is sending to the email account that i putted in contacts.cfg?

That is how it's supposed to work.[/quote]

oviously, sorry, but, the email account that use sendemail to send to the email configured in contacts.cfg is the email configured in resource.cfg where the turorial says?:

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1) Edit /usr/local/nagios/etc/resource.cfg - add (3) new entries. 
$USER5$=your_isp_email_address 
$USER6$=your_isp_email_password 
$USER7$=your_isp_outgoing_mail_server 

[jdalrymple]

The reason for the additional resource.cfg entries is because you're trying to send mail through a SMTP server such as mail.google.com or mail.yahoo.com. This will not work unless you authenticate with a valid user on those servers.

[Jessuzz94]

you mean a authentication like a certificate?

[jdalrymple]

https://en.wikipedia.org/wiki/SMTP_Authentication

Very common way to prevent rogue mailers from causing spam. It's as simple as a username and a password to be allowed to send mail.

You cannot send gmail without a username and password
You cannot send yahoo mail without a username and password

Understand?

[Jessuzz94]

Yes, sorry