oh man so sorry..
yes it was the wrong smtp host...
In mailjet it was not possible to copy the host.
Hello!
I try to set up my mailjet account as smtp server.
I get the following error: getaddrinfo ENOTFOUND in-v3-mailjet.com

Username and API Key is correct (I use this in another app, too)
SPF setup is correct, as I can see in the mailjet console.
Any ideas?
Thank you!
Yes it looks like this. I bought the domain here: https://www.hetzner.com/de/domainregistration
There is already some confusion. My domain is still listed in the consoleh, but with the wrong DNS servers:

Hello!
I am completely new to Cloudron and I would like to start with it.
I'm a hetzner Customer and so I created a new Server with Cloudron.
I'm now at the point to enter my domain and the api key.
But I always get the following message:
Domain nameservers are not set to Hetzner
My domain is: XXX
The domain is from Hetzner with the basic dns settings. I checked them and it should be correct?
https://docs.hetzner.com/de/dns-console/dns/general/authoritative-name-servers
Is there any help? Thanks you!
Fabix