I solved it by myself. I had only add one google DNS (184.108.40.206), needed to add another (220.127.116.11). Also i put in Workgroup as Domain under DNS settings.
I have followed this guide to configure my Xerox 6655 printer to use google smtp server to scanning:https://www.support.xerox.com/en-us/article/en/sE2dGUxlFO85D2mE1sHdt6
When i test the settings under email it says "The system domain name is not configured".
I also can see two red error messages under IP->DNS about hostname and domain name is not verified (in swedish below)
How to configure hostname and domain name in this scenario if you sit on a private net without a domain server?