Not receiving notification mails

[R, Naveen]

Dear All,
I have configured Nagios xi in my machine, that is on windows xp, making use of VM Player Virtual Machine. I have configure it to track some websites and it is tracking correctly, but as last I'm not receiving any mails of this notification. I tried to send the test mail, and I'm receiving it correctly, but when the service is down/up or might be any, I'm not receiving any notification mails for that. So, please can you guide me how I go further in this.

And also when I click on Apply configuration, it happens correctly and when I come to any apply configuration page it says "Warning: configuration file is out of date!" in red.

Also could you tell me the difference between Nagios Xi and Nagios 3.0.6 version, because people who have installed 3.0.6 version, its working correctly for them, but not for me. :-(

So please guide me in resolving this issues.

Regards,
Naveen

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