Thanks for the quick response. I started poking around in the debian bugs database and found a similar issue described here: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=606007
I submitted a comment asking to have the tmp directory added to the chroot tree. ** Bug watch added: Debian Bug tracker #606007 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=606007 -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to postfix in Ubuntu. https://bugs.launchpad.net/bugs/1279116 Title: Missing tmp directory for GSSAPI authentication To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/postfix/+bug/1279116/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs