error signing data: Not trusted

[Patrick Ben Koetter]

Greetings,

I'm using neomutt on a Mac and I'd like to S/MIME sign messages. It used to
work, but since a while it fails with an "error signing data: Not trusted"
the moment I try to send and sign a message.

My S/MIME key is valid until 2027 and the key's cert is imported into gpgsm as
well. What is it I'm missing? The CA cert? Can I / must I set a trust for a
(CA) cert? Any help to debug is very much welcome as I don't really know what
to look at or where to start.

TIA,

p at rick

-- 
[*] sys4 AG

https://sys4.de, +49 (89) 30 90 46 64
Schleißheimer Straße 26/MG,80333 München

Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263
Vorstand: Patrick Ben Koetter, Marc Schiffbauer
Aufsichtsratsvorsitzender: Florian Kirstein