Scott Robbins wrote:
I would try using the article at the CentOS wiki on nagios--even though it's dated, it's still one of the best docs on nagios (which generally has horrible docs, at least it did when I set it up years ago).
See how far you get with that.
I'm assuming that generally, using the mail command on your machine works. If it doesn't, then notifications won't work either.
Bear in mind OP posted the same question to the debian list simultaneously substituting Debian server for CentOS & also maybe English may not be his first language & as we all know even native English speakers don't speak English too cleverly half the time on Google.
Cheers,
Phil...