IDN and Sender-ID (Was: some other questions/comments

[Stephane Bortzmeyer <bortzmeyer@xxxxxx>]

On Mon, Aug 23, 2004 at 04:53:56PM -0700,
 Daniel Quinlan <quinlan@xxxxxxxxxxxx> wrote 
 a message of 27 lines which said:

> - US-ASCII requirement: internationalized DNS?

You mean IDN, RFC 3490? I've understood that you're supposed to use
Punycode (RFC 3492) on the Right-Hand Side of the Sender-ID record,
for instance, when -protocol says:

>   For either type, the character content of the record is encoded as
>   US-ASCII.

You can have:

mx:xn--caf-dma.gennic.net

and then you get the MX of café.gennic.net (warning: composed
Latin character in the domain name).