@nprofile1q...
The punycode host name would be xn--e4h.op-co.de but when establishing an XMPP link, you need to tell the server the Unicode version of the domain inside the XML stream, so if your implementation doesn't support it, you'll be out of luck. I also have xmpp:ツ.op-co.de which doesn't violate IDNA2008 if you want to test.
The punycode host name would be xn--e4h.op-co.de but when establishing an XMPP link, you need to tell the server the Unicode version of the domain inside the XML stream, so if your implementation doesn't support it, you'll be out of luck. I also have xmpp:ツ.op-co.de which doesn't violate IDNA2008 if you want to test.