Package: icedove
Version: 38.4.0-1
Severity: normal

Hello,

when I write a mail to the address uwe@kleine-könig.de if finds its way
to the right server ("Received: ... for <[email protected]>
...."), but the To: header looks wrong. Icedove writes

        To: uwe@kleine-könig.de

in utf-8 (that is, the ö as the two-byte sequence 0xc3 0xb6) without any
further quoting. I think this violates the respective RFCs.
The same happens when I use this address as sender address.

When this mail is shown in icedove, it displays the To: header as:

        To: uwe@kleine-k�nig.de

(i.e. with the three-byte sequence 0xef 0xbf 0xbd). AFAICT the broken
display is OK, because after all the mail is broken.

When sending a mail with Mutt to this idn-address it correctly encodes
to xn--kleine-knig-yfb.de in the To: header which icedove shows as is
after receipt.
(While mutt displays this as "To: uwe@kleine-könig.de".)

Best regards
Uwe

-- System Information:
Debian Release: stretch/sid
  APT prefers proposed-updates
  APT policy: (800, 'proposed-updates'), (800, 'testing'), (800, 'stable'), 
(600, 'unstable'), (500, 'oldoldstable'), (500, 'experimental'), (500, 
'oldstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.2.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages icedove depends on:
ii  debianutils               4.5.1
ii  fontconfig                2.11.0-6.3
ii  libasound2                1.0.29-1
ii  libatk1.0-0               2.18.0-1
ii  libc6                     2.19-22
ii  libcairo2                 1.14.4-1
ii  libdbus-1-3               1.10.4-1
ii  libdbus-glib-1-2          0.102-1
ii  libevent-2.0-5            2.0.21-stable-2+b1
ii  libffi6                   3.2.1-3
ii  libfontconfig1            2.11.0-6.3
ii  libfreetype6              2.6.1-0.1
ii  libgcc1                   1:5.2.1-23
ii  libgdk-pixbuf2.0-0        2.32.2-1
ii  libglib2.0-0              2.46.2-1
ii  libgtk2.0-0               2.24.28-1
ii  libhunspell-1.3-0         1.3.3-3+b1
ii  libnspr4                  2:4.11-1
ii  libnss3                   2:3.21-1
ii  libpango-1.0-0            1.38.1-1
ii  libpangocairo-1.0-0       1.38.1-1
ii  libpangoft2-1.0-0         1.38.1-1
ii  libpixman-1-0             0.33.4-1
ii  libsqlite3-0              3.9.2-1
ii  libstartup-notification0  0.12-4
ii  libstdc++6                5.2.1-23
ii  libvpx2                   1.4.0-4
ii  libx11-6                  2:1.6.3-1
ii  libxcomposite1            1:0.4.4-1
ii  libxdamage1               1:1.1.4-2+b1
ii  libxext6                  2:1.3.3-1
ii  libxfixes3                1:5.0.1-2+b2
ii  libxrender1               1:0.9.9-2
ii  libxt6                    1:1.1.5-1
ii  psmisc                    22.21-2.1
ii  zlib1g                    1:1.2.8.dfsg-2+b1

Versions of packages icedove recommends:
ii  hunspell-de-at [hunspell-dictionary]  20131206-6
ii  hunspell-de-ch [hunspell-dictionary]  20131206-6
ii  hunspell-de-de [hunspell-dictionary]  20131206-6
ii  hunspell-en-us [hunspell-dictionary]  20070829-6
ii  iceowl-extension                      38.4.0-1

Versions of packages icedove suggests:
ii  fonts-lyx         2.1.4-2
ii  libgssapi-krb5-2  1.13.2+dfsg-4

-- no debconf information

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