[kdepim-users] KMail encoding in base64

Stefan Roese stefan.roese at gmail.com
Thu Jul 23 05:44:06 BST 2009

On Wednesday 22 July 2009 23:46:19 Ingo Klöcker wrote:
> > > KMail uses certain heuristics to determine whether the message
> > > should be base64 encoded or quoted-printable encoded. In my
> > > experience, base64 is chosen if the message is pretty short and
> > > contains a few non-ASCII characters (i.e. umlauts, accented
> > > letters, etc.).
> > >
> > > > and how to prevent KMail from doing this?
> > >
> > > Why do you want to prevent KMail from doing so?
> >
> > Because it's not allowed to send such mails to some mailing lists
> > (e.g. u- boot: http://www.denx.de/en/Software/MailingLists).
> >
> > So is there currently no chance to prevent this base64 encoding in
> > KMail?
> No. (Except for the obvious "patch the source code and compile
> yourself".)

Heh. ;)

> Unless the ratio of non-ASCII characters in the message is too high
> KMail shouldn't use base64 encoding. So as workaround you could always
> add a few lines of ASCII characters (maybe as footer) to bring the
> ratio of non-ASCII below the threshold.

I already have a footer in most of my mails (including the base64 one, see 
below). I would really like to avoid adding even more of such text to my 

> Or maybe there's a bug in the
> calculation of the ratio. Can you send me a sample message?

Sure, please find one attached.

Thanks for looking into this.

Best regards,
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