[kmail2] [Bug 294687] S/MIME encrypted and signed e-mails are displayed with a wrong signature in Outlook 2003/2007

[regi.hops at gmx.net]

https://bugs.kde.org/show_bug.cgi?id=294687

--- Comment #17 from regi.hops at gmx.net ---
Created attachment 79375
  --> https://bugs.kde.org/attachment.cgi?id=79375&action=edit
Second try received Mails how they look in Outlook

(In reply to comment #16)

> If these mails are shown correctly singend under Outlook, than actually the
> problem is Outlook.

Hi Sandro,
too bad - both have a broken signature.

Looking at the qouted printable RFC I see that the max. line length should be
76 characters.
While TB uses 72, in KMail options the default is 78.
Also Microsoft stated this:
http://msdn.microsoft.com/en-us/library/ms526941%28v=exchg.10%29.aspx
So I thought - hey this could be a  possible solution and I played with
different LL.
But this makes everything really worse.
It seems that changing the default LL in KMail disables it and it has no effect
in any way.

I attached various screenshots, where the subject should give you the
information of the sending options.
BTW: I also send a mail from TB in quoted printable which is encrypted and
signed correctly.

Some other steps I investigated:
In PHP there is a function quoted_printable_encode and -decode, which are often
used for SMTP-Mails.
The decoding function could decode the produced QP from KMail, but compared to
the encoding function PHP produces a different result.

I will try to produce an encrypted email with PHP, and I have also a Lotus
Domino Mail-Server where I will try to reproduce the problem.

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