Re: [exim] exim and utf8

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Author: Jeremy Harris
Date:  
To: exim-users
Subject: Re: [exim] exim and utf8
On 19/06/2019 00:40, Randy Bush via Exim-users wrote:
> did the fix for the recent vuln possibly cause this?
>
> this is exim forwarding to exim
>     Exim version 4.92 #4 (FreeBSD 11.2) built 25-May-2019 01:19:44
> to
>     Exim version 4.90_1 #4 built 04-Jun-2019 18:44:51

>
> any thing i can do to ameliorate?
>
> randy
>
> 2019-06-18 22:54:35 1hdMzr-000ESq-8e <= bounce+e0fe98.5e6ef-randy=psg.com@??? H=(mail-182-80.mailgun.info) [23.253.182.80] P=utf8esmtps X=TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128 CV=no S=4623 DKIM=notify.docker.com id=20190618225434.73328.89257@7bfeb10228df
> 2019-06-18 23:02:58 1hdMzr-000ESq-8e H=test.psg.com [2001:418:8006::18]: utf8 support required but not offered for forwarding


Possibly indirectly, if the newer build included utf8 support and the
older did not.

You could:

- ask the sender if they really needed to use SMTPUTF8, and persuade
them not it if/when it is not needed by the message (actually, looking
at the env-from there, it probably was)
- ask the system you're forwarding to to update to add international
character support
- discover that you shouldn't really have been forwarding that message,
and close an open relay
- investigate the message and discover it was spam anyway
- configure to disable support for international characters on reception

--
Cheers,
Jeremy