[Evolution] Picture in signature not loaded in Outlook

[Georg Funk <georgfunk hotmail de>]

Dear community,
thanks for this great email-client!

I have noticed that a picture included in an HTML-email-signature will
not be shown in the receivers Outlook 2013.
I've tried to get it working by including the picture in the signature-
editor as well as importing a HTML-File with a base64 image (into the
signature-editor).
Both ways didn't lead to success.
Is there any way to generate Outlook compatible, picture holding
signatures?

Thanks in advance! :-)

Regards, Georg