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List:       info-cyrus
Subject:    Re: IDN
From:       Per olof Ljungmark <peo () intersonic ! se>
Date:       2017-06-15 11:45:01
Message-ID: 35ec01c1-b4a3-95e9-4e02-6a8bc25c53d1 () intersonic ! se
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On 2017-05-12 23:37, Per Olof Ljungmark wrote:
> Thank you for your reply - I meant exactly what I wrote - is it up
> to the delivery agent only (Postfix/lmpt in our case) to decide
> whether to accept a sender with 8bit characters in the address and if
> it does will cyrus digest it. Thanks /per
>
> On 12 May 2017 21:45:07 GMT+02:00, "Niels Dettenbach (Syndicat.com
> <http://Syndicat.com>)" <nd@syndicat.com> wrote:
>
>
> Am 12.05.2017 um 19:39 schrieb Per olof Ljungmark
> <peo@intersonic.se>:
>
> Does Cyrus Imap support IDN (International Domain Names) as sender
> address or is it just the delivery agent that takes care of this?
>
> Not sure, what you mean in detail.
>
> We successfully receive mail from IDN domain senders over EXIM /
> Cyrus, while it is typically not a good idea to have any IDN domain
> in an email address (lack of "standardization" / compatibility). But
> I=92m not sure how reliable this works.
>
> Like, for instance, =FCber or g=F6sta.
>
> Then of course is the question if there is support for 8bit mailbox
> names as well.
>
> For that what i have seen - not really.
>
> In the past we recommended our users to avoid using i.e. german
> Umlauts within folder names, even if they seems to get =84converted=93 by
> cyrus in a working or even proper manner - there will be problems
> with several IMAP clients not liking this, which still have problems
> with that on their side=85

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 "=FC" in it.

Really grateful for a hint.

Thanks,

//per
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