Sometimes you’ll need to add certain packages to your Linux server, and CSF will sometimes send emails to make sure you can keep an eye on suspicious processes and activity. If you know something is not malicious, you can add it to the ignore file to stop receiving these emails. As an example, we recently installed NixStats to keep track of server usages and uptime. This adds a user called nixstats, which will be flagged when it’s used, sending a lot of emails to you.
Open up the file,
$ sudo nano /etc/csf/csf.pignore
At the bottom, along with what should be other lines, add using the following format:
Then go ahead and restart lfd.
$ sudo csf -r
For more details and information, check out ConfigServer.