The TLD .app was released by Google and it’s available since May.
So I tried to generate one single SSL certificate for multiple domains which have the .app extension with the following command:
sudo certbot certonly -d mydomain.app -d www.mydomain.app -d api.mydomain.app -d i.mydomain.app
No matter what authenticator I use, I receive the same error:
An unexpected error occurred:
The request message was malformed :: Error creating new authz :: Name does not end in a public suffix
If I understood correctly it seems that .app extension is not recognized by let’s encrypt as a valid suffix.
There is any workaround I can use to obtain a SSL certificate for my .app domains?