tl;dr: Google Workspace's signup page blocks legitimate domains because a frontend regex list flags anything matching patterns like `web\..*` or `me\..*` as an "email provider" — affecting even the Ukrainian Ministry of Economy's me.gov.ua domain. Google support was useless, suggesting the author switch domains rather than fix the bug. The author bypassed it by disabling the client-side validation function in the browser, since the check isn't enforced server-side. The issue reportedly still exists as of August 2026.