Background reading for non-ASCII mailbox names

["D. J. Bernstein" <djb@xxxxxxxx>]

My web page http://cr.yp.to/djbdns/idn.html discusses six problems
caused by careless internationalization proposals:

   * interoperability failures;
   * inconsistent displays;
   * unnecessary implementation and deployment costs;
   * multiple semantically similar names;
   * identical displays of different names; and
   * typing failures.

The discussion focuses on domain names for concreteness, but the same
principles apply to mailbox names, login names, etc.

---D. J. Bernstein, Associate Professor, Department of Mathematics,
Statistics, and Computer Science, University of Illinois at Chicago

P.S. The mailing-list software silently discarded this message the first
time I sent it.