What is lonex?

[Danny R. Brown]

Greetings:
  I've been playing with the mail system. Mailing to root brings up
                 can't find usr/lonex/xmail
This in itself is not a problem, as I only tried this to see what would
happen. However, I am curious as to what the lonex directory is (was).
It does not appear in my listing of the contents of tape 2.
Cheers!
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