I'm using Nagios® Core™ Version 4.1.1. I can't send e-mail settings.
During installation, it defined my own email address. I installed Nagios on CentOS.
You can see in the picture below.
Thank you for your answer. Where can I get the password control. As you can see in the picture, I fix the passcode 143082. I think I need to write this code more elsewhere. I just ask you please show me the way? I made my nagios monitor settings are as follows. vi /usr/local/nagios/etc/commands.cfg ...