Hi @ggemmill
see your output. Your ipv6 sends a http status 204 - No Content. Looks like ipv6 is defined, but your webserver doesn't answer with the correct result.
Yep - checked your domain - https://check-your-website.server-daten.de/?q=handel.gemmill.name - you have ipv4 and ipv6:
| Host | T | IP-Address | is auth. | ∑ Queries | ∑ Timeout |
|---|---|---|---|---|---|
| handel.gemmill.name | A | 78.141.12.8 Walsall/England/United Kingdom (GB) - Daisy Communications Hostname: 78-141-12-8.xdsl.murphx.net | yes | 1 | 0 |
| AAAA | 2001:8d8:1000:30d7:5bfb:a07d:d028:8023 Rheinmuenster/Baden-Württemberg/Germany (DE) - SCHLUND | yes | |||
| www.handel.gemmill.name | A | 78.141.12.8 Walsall/England/United Kingdom (GB) - Daisy Communications Hostname: 78-141-12-8.xdsl.murphx.net | yes | 1 | 0 |
| AAAA | yes |
Looks like ipv4 and ipv6 have different machines, one in GB, one in DE. So that can't work.
Remove your ipv6 or (if exist) change to your correct ipv6.