Afilias, the .info registry, has created software that will enable emails to be sent and received using fully internationalized domain names.
The company has demonstrated a practical application using Jordan’s recently implemented Arabic TLD. There’s a video of the demo here.
The software, built on an open-source code base, comprises webmail, desktop, mail server and a management interface.
Afilias is looking for beta testers, and a spokesperson tells me it will also try to license the software to third parties.
IDNs are tricky because while users see characters in Arabic or Cyrillic, say, the underlying DNS handles them as encoded ASCII, with the translation happening the client.