[horde] Problem with umlauts in signature

[Jens Grüntjes]

Zitat von Jens Grüntjes <jens.gruentjes at ebira.de>:

> Hello list,
>
> after upgrading from Horde 4.x to Horde 5.0.0 and Imp 6.0.0 the  
> signature of a colleague of mine looks strange concerning german  
> umlauts. The signature should be
>
> Ebert + Grüntjes GbR
> Michael Ebert, Jens Grüntjes
>
> but in a mail from my colleague this appears in my Inbox (as well as  
> in her sent-mail folder) as
>
> Ebert + Grüntjes GbR
> Michael Ebert, Jens Grüntjes
>
> It looks like the ü is wrongly encoded (like a UTF-8 character shown  
> in latin1). In the Preferences the ü is shown correctly. My  
> colleague uses Windows 7 and tried to change the signature in  
> Firefox 16 and IE 9 but no change. I uses almost the same signature  
> but mine is shown correctly as well in Inbox as in sent-mail. I use  
> Linux and Firefox 16.
>
> Can somebody help me?
> -- 
> Viele Grüße
> Jens

After further debugging I found out that a mail from the mentioned  
colleague seems to be in ISO-8859-1 whereas my mails are UTF-8. You  
can see that in the mail-source:

Source of colleague's mail:

Message-ID: <20121106083959.Horde.ONQWSUrzi9JQmMzfPTZFFsA at mail.ebira.de>
From: User XXXXX <user.xxxxx at ebira.de>
To: Jens =?iso-8859-1?b?R3L8bnRqZXM=?= <jens.gruentjes at ebira.de>
Subject: test
User-Agent: Internet Messaging Program (IMP) H5 (6.0.0)
Content-Type: text/plain; charset=ISO-8859-1; format=flowed; DelSp=Yes
MIME-Version: 1.0
Content-Disposition: inline
Content-Transfer-Encoding: 8bit



-- 
Ebert + Grüntjes GbR
Michael Ebert, Jens Grüntjes


Source of my mail:
Message-ID: <20120319225048.Horde.so1cYUrzi9JPZ6o4OMymXzA at mail.ebira.de>
From: Jens =?utf-8?b?R3LDvG50amVz?= <jens.gruentjes at ebira.de>
To: User XXXXX <user.xxxxx at ebira.de>
Subject: Test
User-Agent: Internet Messaging Program (IMP) H4 (5.0.19)
Content-Type: text/plain; charset=UTF-8; format=flowed; DelSp=Yes
MIME-Version: 1.0
Content-Disposition: inline
Content-Transfer-Encoding: 8bit


-- 
Jens Grüntjes

Ebert + Grüntjes GbR
Michael Ebert, Jens Grüntjes


In Jan's announcement of Horde Groupware Webmail Edition 5.0.0 in the  
section "General changes" I find a bullet point saying "* Default to  
UTF-8 for all e-mail messages." Now I'm desperately seeking in the  
user's preferences where to change from the old ISO-8859-1 to UTF-8.  
Or should that be done automagically during the upgrade?

-- 
Viele Grüße
Jens