I exported my collected emailadresses from thunderbird to a *.CSV-file and then tried to import those emailadresses into the Antispam-function of KIS2021. The import did not work only stating there was an error but not stating WHAT the error was.
So how must a *.CSV-file look like to make the email-adress-import into KIS2021 Antispam a success?
I tried a single columm CSV-file with emailadresses. But this did not work.