Nullmailer

• installed nullmailer on all machines
• added nullmailer to CFengine list of packages to install (for all machines but hermes, our mailserver). Note that I couldn't get this to work. So I left it in the CFengine config for when we do get it working, but for now you must also install it manually
• Need to create files /etc/nullmailer/remotes and /etc/nullmailer/adminaddr (done with CFengine for all machines but hermes, our mailserver)
• Make sure that /etc/mailname exists and is set to ugcs.caltech.edu (should be managed using CFEngine but not sure if it currently is)
• Make sure /usr/var/nullmailer/tmp/ is writeable.