Yeah you're on the right track, but you'll also need to make sure postfix knows to allow certain hosts to us it as a relay. You can do this right in the main.cf file with something like the following: mynetworks: 192.168.0.0/27, 127.0.0.0/8 Either that or setup SMTP AUTH and TLS to restrict relaying by user account. There are a number of ways to setup your client machines with postfix/exim/sendmail/ssmtp to be an auth client. On Dec 27, 2007 11:30 AM, Tim Wilson <wilson at visi.com> wrote: > Hey everyone, > > I'd like to create a little server running Ubuntu and postfix that > would be a mail relay for a few other servers in our school district. > For example, rather than configuring our Moodle and nagios servers to > send their own mail, I'd like to point them at the mail relay and have > it send the mail for them. This box would not need to receive mail, > only send it. We run GroupWise for our staff email accounts, but it > can be a hassle to configure other servers to send mail through GW > sometimes. > > I started putting together a main.cf file for postfix and got this far > (in addition to the other default settings): > > mydestination = $myhostname, localhost.$mydomain, $mydomain > myhostname = bison > mydomain = buffalo.k12.mn.us > myorigin = $mydomain > relayhost = monitor.buffalo.k12.mn.us # This is our nagios server > > Am I on the right track here? > > -Tim > > -- > Tim Wilson, The Savvy Technologist > Twin Cities, Minnesota, USA > Educational technology guy, Linux and OS X fan, Grad. student, Daddy > mailto: wilson at visi.com aim: tis270 blog and podcast: > http://technosavvy.org > > > > _______________________________________________ > TCLUG Mailing List - Minneapolis/St. Paul, Minnesota > tclug-list at mn-linux.org > http://mailman.mn-linux.org/mailman/listinfo/tclug-list > > -- Ben Lutgens Linux / Unix Sysadmin -------------- next part -------------- An HTML attachment was scrubbed... URL: http://mailman.mn-linux.org/pipermail/tclug-list/attachments/20071227/47646bbc/attachment.htm