Kmail and smime

[mh at mike.franken.de]

On Freitag, 27. Februar 2026 11:46:12 Mitteleuropäische Normalzeit Sebastian Gödecke wrote:
> Hi,
> i've a smime cert and try to use it with Kontakt/Kmail. It is imported
> in Kleopatra and there is everything okay.
> So i set it up in kmail to use this cert and when i try to write an
> email, my email will be added with this smime.p7s and has the
> signitar. So i send my mail, have to type my password for this cert
> and then it will be sent. So i try it now to send it to me and then
> it's a red sign, and it says: The signature is invalid: Incorrect
> signature
> 
> So i try my smime with outlook in windows and in betterbird here on my
> Manjaro KDE and with both apps it's working. Only with kmail there is
> this problem.
> 
> Any idea where i could have a look in my settings? The smime setting
> in kmail is filled with my smime-cert and this is "green", any other
> option i could check maybe "default-domain" (i changed it now to our
> real domain but this didn't work) or anything else?
> 
> Many thanks for some responses.
> 
> 

I often have similar problems here, too.
Sometimes a mail to some recipient in the sent folder shows an invalid
signature, sometimes it shows exactly the same signature as valid.
It might be caused by the recipient, because it always happens for the
same recipient.

Bye.
Michael.
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