Nagios Support Forum

Dear all,
I installed postfix on my CentOS; i tested OK with postfix but i could not receive alert email from nagioscore. When checking /usr/local/nagios/var/nagioslog, i seen an error:

"emailaddress" resulted in a return code of 127. Make sure the script or binary you are trying to execute actually exists...

Can you please advice me for this error?

Can you post your notification command definitions? Also, do you receive mail okay if you run the following command (edit to use your email address)?

Many thanks agriffin,
After running "echo testing | mail myemailaddress@domainname" command;
i seen that i need to install mailx package for further, after done that, i could receive email from nagios

Many thanks for your help, agriffin