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Block sign-ups from configured email domains - #532
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Adds SIGNUP_BLOCKED_EMAIL_DOMAINS, a comma-separated list of email domains (and their subdomains) that may not create accounts. Enforced in Better Auth's user.create.before hook, so it covers email/password, social, and admin-created users alike. Blocked attempts get a 403 and no user row is written. Unset = nothing blocked. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
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Summary
SIGNUP_BLOCKED_EMAIL_DOMAINSenv var on the api: a comma-separated list of email domains that may not create accounts. Subdomains of a listed domain are blocked too; matching is case-insensitive and uses the domain after the last@.databaseHooks.user.create.before, so it applies to email/password, Google/GitHub, and admin-created users. A blocked attempt returns403 {"message":"Sign-ups from this email domain are not allowed."}and writes no user row.Useful for shutting off a domain that's sending spam sign-ups without a code change.
Testing
signup-email-domains.test.ts: parsing, case-insensitivity, subdomains, lookalike domains (notspam.example,spam.example.org), and quoted local parts.POST /api/auth/sign-up/emailwith a blocked domain → 403 and no user stored; an allowed domain → 200.pnpm --filter @superlog/api typecheckpasses.🤖 Generated with Claude Code
Summary by cubic
Adds a
SIGNUP_BLOCKED_EMAIL_DOMAINSenv var that blocks account creation from listed email domains, so a domain sending spam sign-ups can be shut off without redeploying.New Features
@.Written for commit a57e6ba. Summary will update on new commits.