✅ Welcome to faß.idn.anymail.dev
Congratulations, this is the real faß site.
If you got here by following a link to faß.idn.anymail.dev, everything involved in generating that link (plus your browser) implements IDNA 2008 (RFC 5895), and you have avoided a site spoofing attack..
(If anything had used the outdated IDNA 2003, you would have instead ended up at the spoofing site fass.idn.anymail.dev.)