Re: [idn] A UTF-8 test for mail clients

["A. Vine" <avine@eng.sun.com>]

"D. J. Bernstein" wrote:
> 
> 1. This is a MIME message with charset=utf-8. Your mail client should
> display the two-byte UTF-8 sequence \317\200 in the message body as the
> Greek letter pi. Here's a pi between brackets: [Ï€]
> 
> 2. This message also includes a pi in the From line, right before the @:
> 
>    From: "D. J. Bernstein" <djb-pibounce-Ï€@cr.yp.to>
> 
> Of course, there's no character-set declaration for that address, but
> your client should display it as UTF-8 anyway. The most common mistake
> will be to treat it as 8859-1: a double-dotted I and a block.

Or Windows CP1252 including euro, which causes a euro symbol to be displayed
next to the capital I with diaeresis.

> 
> 3. Try replying to this message. Your mail client and mail server should
> be able to handle the djb-pibounce-Ï€@cr.yp.to address. You will receive
> a bounce from muncher.math.uic.edu showing the exact contents of your
> mail as received by my mail server.
> 
> Note that there's no IDN here. The non-ASCII characters in the address
> are in the box part, not the domain part. But that difference doesn't
> matter for typical mail clients. This test avoids triggering DNS client
> bugs, such as the BIND gethostbyname() bug.
> 
> The address will be corrupted if your message passes through Sendmail:
> the second pi byte, \200, will be stripped. You will still receive a
> bounce from muncher in this case.
> 
> Finally, send a message to results@pi.cr.yp.to telling me what happened.
> 
> ---Dan