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<div style="direction: ltr;">Oh you already tried and it works. I suggest RIPE can convert the IDN domains to punnycode on database.</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> David Guo <david@xtom.com><br>
<b>Sent:</b> Tuesday, November 19, 2019 2:32:54 PM<br>
<b>To:</b> Thomas Hungenberg <th@cert-bund.de>; anti-abuse-wg@ripe.net <anti-abuse-wg@ripe.net><br>
<b>Subject:</b> Re: [anti-abuse-wg] Non-ASCII characters in abuse-mailbox addresses</font>
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<div style="direction:ltr">Did you try IDN / Punnycode converter?</div>
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<div style="direction:ltr">Try abuse@xn--zrich-kva.email ?</div>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> anti-abuse-wg <anti-abuse-wg-bounces@ripe.net> on behalf of Thomas Hungenberg <th@cert-bund.de><br>
<b>Sent:</b> Tuesday, November 19, 2019 2:27:13 PM<br>
<b>To:</b> anti-abuse-wg@ripe.net <anti-abuse-wg@ripe.net><br>
<b>Subject:</b> [anti-abuse-wg] Non-ASCII characters in abuse-mailbox addresses</font>
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<div class="x_PlainText">Hi,<br>
<br>
some abuse contacts registered with RIPE use non-ascii characters with<br>
the abuse-mailbox addresses, e.g.<br>
<br>
% Abuse contact for '195.78.76.0 - 195.78.77.255' is 'abuse@zürich.email'<br>
<br>
However, the corresponding MTA does not support SMTPUTF8:<br>
<br>
7B579403C6: to=<abuse@zürich.email>,<br>
relay=mail.xn--zrich-kva.email[109.95.241.50]:25, delay=0.33,<br>
delays=0.01/0/0.32/0, dsn=5.6.7, status=bounced (SMTPUTF8 is required, but was<br>
not offered by host mail.xn--zrich-kva.email[109.95.241.50])<br>
<br>
(In this particular case, sending email to the IDNA representation of the<br>
email address <abuse@xn--zrich-kva.email> works.)<br>
<br>
In our experience, using umlauts and other non-ascii characters in<br>
(the host part of) email addresses still cause a lot of problems in general.<br>
Even if the recipient's MX supports SMTPUTF8 correctly, MTAs on the transport<br>
way may fail to handle SMTPUTF8 messages.<br>
<br>
To prevent such problems and make sure all abuse mailboxes can be addressed,<br>
I wonder if the values of abuse-mailbox attributes should be restricted to<br>
ASCII characters only.<br>
<br>
What do you think?<br>
<br>
<br>
- Thomas<br>
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