Broken character set for QP UTF-8 emails
At the moment some emails containing Umlaute are displayed broken on the receiver side:
----==_mimepart_5a1d7b7f642c3_79ec11a1c3c315a
Content-Type: text/plain;
charset=UTF-8
Content-Transfer-Encoding: 7bit
From: xy@example.org
To: someine@example.com
Cc:
Date: Tue, 28 Nov 2017 17:27:25 +0100
Sig: Unsigned
Enc: Encrypted
----==_mimepart_5a1d7b7f642c3_79ec11a1c3c315a
Content-Type: text/plain;
DelSp=Yes;
charset=US-ASCII;
format=flowed
Content-Transfer-Encoding: quoted-printable
Content-Disposition: inline
Content-Description: =?UTF-8?Q?PGP-verschl=C3=BCsselte_Daten?=
Content-ID: <foobar@somehost.mail>
Hello
K=C3=B6nntet
liebe Gr=C3=BCsse
----==_mimepart_5a1d7b7f642c3_79ec11a1c3c315a--This is because the mime part has charset US-ASCII, while it should be UTF-8. Originally, it was UTF-8.
The fix for it is b9e0ab35
Still requires tests to test for future regressions