This is a test box but I want to understand how to trouble-shoot this and find out what is causing it. How do I diagnose the issue? Have any of you experts seen this error before? I am a newb and dont know anything about red hat email. It appears something? I dont know what.. can't open "/etc/mail/trusted-users" of which I have no idea what this directory or file does.
Is this program called sendmail? How do I know?
[root@101 Server]# mail
No mail for root
[root@101 Server]# mail firstname.lastname@example.org
/etc/mail/submit.cf: line 544: fileclass: cannot open '/etc/mail/trusted-users': Group writable directory