In short: it is the job of the client to convert an IDN to Punycode. Example:
köthe.de -> xn--kthe-5qa.de
Testcases: http://www.köthe.de http://www.münchen.de http://www.köln.de
The status of IDN support in Debian:
Browser
Software |
IDN |
note (Debian bug; upstream bug) |
Firefox/Iceweasel |
|
|
Email client