Plumber is working fine. You simply asked it to connect two programs inappropriately -- an upas/nedmail running in one name space with an upas/fs running in a different name space.
If, on the other hand, you were also running acme Mail in the cpu window, then everything would have worked out fine, even though plumber and faces are on different machines from upas/fs and Mail. Embedding machine names in messages attacks the generality and power of the system. Plan 9 relies heavily on its conventions. If you break the conventions, sometimes the system doesn't work as well (bind /net/tcp /proc && ps). But being able to break the conventions is important and powerful, because if you break them just a little, sometimes the system works even better (import helix /proc && acid 123; sshnet; snapfs; bind /mnt/term/net/tcp /net/tcp && ssh; etc.). Russ
