can not encrypt (but decrypt) dues to missing pub key

[Ingo Klöcker]

On Mittwoch, 1. April 2020 19:39:24 CEST Matthias Apitz wrote:
> El día Mittwoch, April 01, 2020 a las 06:59:17 +0200, Ingo Klöcker escribió:
> > On Mittwoch, 1. April 2020 17:30:29 CEST Matthias Apitz wrote:
> > > I encounter in my server the following situation: I can decrypt files
> > > but not encrypting any file:

Maybe the key is expired or not usable for encryption for some other reason. 
gpg will happily use an expired key for decryption (of old encrypted data), 
but it won't use an expired key for encryption.

What does
gpg --list-public-keys --with-colons guru at unixarea.de
say?

Regards,
Ingo