feat(auth): send auth mail via Bento queue - #3139
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GoTrue Send Email hook writes to pgmq so mail is not lost if Bento is down. The queue consumer emits transactional events instead of SMTP. Co-authored-by: Cursor <cursoragent@cursor.com>
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📝 WalkthroughWalkthroughSupabase Auth email events now use a queued ChangesAuthentication email delivery
Estimated code review effort: 3 (Moderate) | ~25 minutes Merge Risk: 🟠 High · up to The new authentication email flow can generate broken signup, recovery, and magic-link URLs, mishandle secure email-change tokens, and send email-change security alerts to the wrong address. These are high-impact correctness and security issues, so the PR is not ready to merge until they are fixed. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches 💡 1📝 Generate docstrings 💡
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Merging this PR will not alter performance
Comparing 
Footnotes
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Match the transactional events already created in Bento instead of colon-prefixed names that would never fire those emails. Co-authored-by: Cursor <cursoragent@cursor.com>
Do not flatten a custom HTTP body in the hook. pgmq.send the event; queue_consumer posts payload like every other function queue. Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Cursor <cursoragent@cursor.com>
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Actionable comments posted: 5
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Inline comments:
In `@supabase/functions/_backend/triggers/send_email.ts`:
- Line 40: Update the trackBentoEvent call in the email_changed_notification
flow to use payload.old_email as the recipient instead of payload.email, and add
a test verifying the security notification is sent to the old address.
In `@supabase/functions/_backend/utils/auth_email.ts`:
- Around line 20-30: Update GoTrueSendEmailEvent and the email handler to
preserve token_new and token_hash_new, then emit Secure Email Change events with
token/token_hash_new to user.email and token_new/token_hash to user.new_email;
otherwise emit one event to user.new_email using the populated token pair.
Update the Bento trigger and unit tests to cover both flows.
In `@supabase/migrations/20260820101459_auth_send_email_hook_queue.sql`:
- Around line 66-72: Update the queued email_change handling around pgmq.send so
that when both token pairs exist it emits two Bento deliveries: user.email with
token and token_hash_new, and user.new_email with token_new and token_hash. Add
coverage verifying both deliveries are produced.
In `@supabase/templates/bento/auth_signup.html`:
- Around line 10-27: Update buildAuthEmailBentoDetails to add a complete encoded
confirmation_link while preserving confirmation_url unchanged. Render
event.details.confirmation_link in supabase/templates/bento/auth_signup.html
lines 10-27, auth_recovery.html lines 13-30, auth_invite.html lines 10-27,
auth_magiclink.html lines 19-36, and auth_email_change.html lines 13-30; each
site requires this direct template substitution.
In `@supabase/tests/66_test_on_user_org_access_queue.sql`:
- Line 131: Split the long SQL assertion description string in the
high-frequency queue ordering test into adjacent shorter string literals so it
satisfies SQLFluff LT05 while preserving the exact test description.
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📒 Files selected for processing (20)
cloudflare_workers/api/index.tssupabase/config.tomlsupabase/functions/_backend/triggers/send_email.tssupabase/functions/_backend/utils/auth_email.tssupabase/functions/triggers/index.tssupabase/migrations/20260820101459_auth_send_email_hook_queue.sqlsupabase/templates/bento/auth_email_change.htmlsupabase/templates/bento/auth_email_changed.htmlsupabase/templates/bento/auth_invite.htmlsupabase/templates/bento/auth_magiclink.htmlsupabase/templates/bento/auth_mfa_factor_enrolled.htmlsupabase/templates/bento/auth_mfa_factor_unenrolled.htmlsupabase/templates/bento/auth_password_changed.htmlsupabase/templates/bento/auth_reauthentication.htmlsupabase/templates/bento/auth_recovery.htmlsupabase/templates/bento/auth_signup.htmlsupabase/tests/66_test_on_user_org_access_queue.sqlsupabase/tests/72_test_hook_send_email.sqltests/auth-email.unit.test.tstests/send-email-trigger.unit.test.ts
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Secure email change sends two Bento events with the GoTrue token pairs. Confirmation links are encoded so confirm-signup keeps type and redirect. Missing Bento now fails the queue job instead of dropping mail. Co-authored-by: Cursor <cursoragent@cursor.com>
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All reported issues were addressed across 10 files (changes from recent commits).
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Templates copy from → to using user.email, not the Bento recipient. Co-authored-by: Cursor <cursoragent@cursor.com>
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Summary (AI generated)
pgmq.send_email;high_frequency_queuesdrains it every 10s.auth_confirmation,auth_recovery,auth_magic_link,auth_invite,auth_email_change,auth_reauthentication,auth_email_changed_notification,auth_password_changed_notification,auth_mfa_factor_enrolled_notification,auth_mfa_factor_unenrolled_notification.site_url,confirmation_url,email,new_email,old_email,token,factor_type.supabase/templates/bento/auth_*.html(upload them in Bento; they are not applied automatically).Motivation (AI generated)
SMTP from Supabase is being retired. Auth emails must stay durable: if Bento is down, the hook still succeeds once the row is in pgmq, and the existing queue retry budget (max 5) sends the event later.
Business Impact (AI generated)
Signup, password reset, magic link, and security notification emails keep working after the SMTP cutover. Lost auth emails block logins and account recovery.
Test Plan (AI generated)
pg-functions://postgres/public/hook_send_email(do not use SMTP).auth_*event.auth_confirmationarrives in Bento with a working confirmation link.auth_recovery.auth_magic_linkincludes the OTP token.auth_email_changeincludesnew_email.Generated with AI
Summary by CodeRabbit
New Features
Bug Fixes