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Ran 23 Dec 2025 02:34PM UTC

Files 171

Run time 56min

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Committed 23 Dec 2025 02:26PM UTC coverage: 68.784% (+0.1%) from 68.686%

Job # 20463305468.1

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push

github

Committed by

web-flow

Commit Message

fix: tighten email validation rules (#2304)

The goal here is to limit the conditions which resolver implementations
can affect the determinism of our DNS checks, without allowing transient
DNS failures to block signups:

* Reject single label email domains (`a@a`, `a@gmail`)
* Use absolute FQDN for DNS lookups to avoid implicit search behavior
* Preserves the RFC 5321 fallback, but narrows when it is called
* Add an allow list for major email providers to lower latency
* Reject mutated display name address that the mail parser might accept
* Add test coverage for some corner cases

Co-authored-by: Chris Stockton <chris.stockton@supabase.io>

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