I am pretty much a Unix dummy. :)
Still I "inherited" the management of our workstations. We have Sendmail 8.8.8 under SunOS 5.6 installed.
Now how can I make sure, the smtp daemons on our workstations do NOT relay any mail FROM outside TO someone outside?. Although smtp configuration is known to be a pain in the $&%, I hope there is a relatively simple way to do it.
And is there a way to check whether I was successuful?