On 06/04/2019 11:34, André Rodier via dovecot wrote: > On Sat, 2019-04-06 at 11:19 +0200, John Fawcett via dovecot wrote: >> On 06/04/2019 10:07, André Rodier via dovecot wrote: >>> On 05/04/2019 08:57, David Bürgin via dovecot wrote: >>>> André, are you quite sure you have it working? >>>> >>>> In this thread someone from Open-Xchange stated that no, Dovecot doesn’t >>>> have SMTPUTF8 support implemented, and the same response was given by >>>> another Dovecot developer last September (it ‘is being considered’ was >>>> the answer then, see >>>> https://dovecot.org/pipermail/dovecot/2018-September/112887.html). >>>> >>>> I am using LMTP to deliver mail to Dovecot from Postfix, and delivery >>>> fails with Postfix reporting: ‘SMTPUTF8 is required, but was not offered >>>> by host mail.my.org[private/dovecot-lmtp]’. I doubt that this can work >>>> without a change in Dovecot LMTP. >>>> >>>> Anyway, I am also interested in SMTPUTF8 support, so +1 from me! >>>> >>>> >>> Hello David et al, >>> >>> I have it working with my set up, and I confirm it is not easy. >>> >>> If I limit the stack to OpenLDAP, Postfix and Dovecot to their >>> simplest configuration, it is relatively easy, even with slightly >>> outdated software in Debian Stretch. >> I think you are confusing acceptance of UTF8 in the localpart of the >> email address (which if I remember correctly worked in the 2.2 branch) >> with SMTPUTF8 support. As mentioned in the thread above Dovecot does not >> as yet support SMTPUTF8. Support for SMTPUTF8 would mean among other >> things changing the source code of Dovecot so that it announces the >> SMTPUTF8 key word to the upstream MTA. >> >> John > Hello John, > > You are probably right. > > I am not well aware of the low level details and the terminology. > > I confess I am mostly interested in the proper reception of the emails > with accentuated user names, which is already sometimes difficult to > achieve. > > Is there any link where I can learn the communication rules between > Dovecot and Postfix and the SMTPUTF8 standard ? > > Kind regards, > André > André
Daniel Lange has posted some links to this topic from Postfix and earlier discussions on the mailing list. Postfix has this SMTPUTF8 documentation: http://www.postfix.org/SMTPUTF8_README.html On that page you can also find links to the relevant standards including SMTPUTF8 standard. John