How can I block access to some tools (like edit, erase, config...) for each user? I want only admin users can edit, erase , etc. 

I want know too, how can I erase configuration of SMTP?  I make a test with the "elogd -t" command and now every time I create a new entry in my log book I receve the mensage of error to send email, cause I don't configure a SMTP host.