IDN - Need help

Walter H. Walter.H at
Sun Jun 18 10:24:38 EDT 2017

On 18.06.2017 14:35, Per olof Ljungmark wrote:
> On 6/18/2017 2:07 PM, Walter H. via Info-cyrus wrote:
>> On 18.06.2017 14:00, Per olof Ljungmark wrote:
>>> I am re-posting this - would really like some help here. We need Cyrus
>>> to accept mail with international characters in sender address. If
>>> someone have experience please share, thanks!
>>> This is what Postfix reports when it tries to deliver to Cyrus:
>>> (SMTPUTF8 is required, but was not offered by host XXX
>>> [/var/imap/socket/lmtp])
>>> (can't see anything relevant in the log from Cyrus)
>>> We want it to be delivered but I cannot figure out how - the sender
>>> address has a "ü" in it.
>>> Really grateful for a hint.
>>> Thanks,
>> IDN domains are internally like
>> xn--.....
>> see here ...
>> and I don't see a reason why not accepting
> Yes, I know about the format, what I do not understand is how it is
> supposed to be implemented.
> Postfix is delivering via lmtp as "ü", not converted to Punycode.
> Are
> you saying that it should arrive to our mx's already converted?
are you talking about TCP/IP connections, DNS-resolutions or Mail content?
> The
> sender in question uses a @gmail address.
gmail is *NOT* IDN

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