Failed to Send Notification

[adi yesaya]

>
>
>
> <chop>
>
> Fallback.nl.uu.net is rejecting the e-mail because the MTA on your
> nagios box, not nagios itself, is claiming to be called
> localhost.localdomain, which is an unverifiable name. It's very
> reasonable that they would do that. You need to configure the MTA on
> your nagios box to use a real hostname that can be found in the DNS.
> This may be as simple as adding the hostname to your DNS and editing
> your /etc/hosts file on your nagios box, changing the 127.0.0.1 entry to
> something like --
>
> 127.0.0.1 yourhost.yourdomain.foo localhost.localdomain
>
> You'd need to restart your MTA if it's running as a daemon after making
> that change. If that doesn't work, you'll need to specifically configure
> the MTA that you're using to masquerade as that host or domain. You can
> do this for Sendmail by setting the MASQUERADE_AS macro. Under Postfix I
> believe it's the myorigin variable.
>
> --
> Marc



How can I know what MTA I am using?
At the nagios command.cfg, the email-notification is send by using /bin/mail
,
but is /bin/mail a MTA or just to send email?
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