[ext] What is the state of SMTPUTF8 support?

[Philip Iezzi]

> On 15 Mar 2021, at 14:17, Sylvhem <sylvhem at lepubdelobservateur.fr> wrote:
> 
> Le dimanche 14 mars 2021 à 21:13 +0100, Benny Pedersen a écrit :
>> On 2021-03-14 17:29, Ralf Hildebrandt wrote:
>>> * Ralf Hildebrandt <Ralf.Hildebrandt at charite.de>:
>>>>> I didn’t get any answer. Does somebody know if there was any
>>>>> progress
>>>>> in implementing the RFC 6531?
>>>> 
>>>> http://www.postfix.org/SMTPUTF8_README.html
>>> 
>>> Sorry, I was on the wrong list.
>> 
>> is there hope to see dns server support rfc 6531 ?
>> 
>> how should dovecot and postfix handle both idn and eai maps, postfix
>> is 
>> not ready yet there, its does not matter aslong dns have yet to
>> support 
>> eai aswell
> 
> I’m sorry, but I’m a bit puzzled by your answer.
> What is the relation between RFC 6531 and the DNS? I’m clearly no
> expert, but I thought that RFC only specified an SMTP extension. How
> are DNS servers concerned by that?
> Anyway, Postfix already implemented SMTPUTF8. Having Dovecot do as well
> would allow for mail-stack that rely on both Postfix and Dovecot to
> send e-mail using addresses containing non-ASCII characters. That would
> be a big progress for people who wish to use internationalized e-mail
> addresses.
> And the last time I asked questions about it here, people said to me it
> was being worked on. Hence my question.
> 
> --
> Sylvhem

Hi there

Any update on this? I am running latest Dovecot 2.3.19, but lmtp still doesn't seem to support SMTPUTF8. In my mail.log I am getting the following bounces, while using `smtputf8_enable = yes` (which nowadays is the default) in Postfix:

status=bounced (SMTPUTF8 is required, but was not offered by host mail.example.com[/var/run/dovecot/lmtp])

(Dovecot running on the same server, mail.example.com = localhost, in this example)

Cheers,
Philip