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Wabenhain/scripts
Nick SzaunigandClaude Opus 5.5 11910dd6dd
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refactor(mail): send via the SSO app registration, drop SMTP basic auth
Mail now uses the same Entra ID app registration as "Sign in with
Microsoft" (ENTRA_TENANT_ID, ENTRA_CLIENT_ID, ENTRA_CLIENT_SECRET), so
only one enterprise application is needed. The app additionally gets
the SMTP.SendAsApp permission; Exchange still limits it to the mailbox
granted via Add-MailboxPermission.

Password (basic auth) sending is removed entirely: SMTP_HOST, SMTP_PORT,
SMTP_PASSWORD and the separate SMTP_OAUTH_* settings are gone. The
transport is fixed to smtp.office365.com:587 with required STARTTLS.
SMTP_USER (sending mailbox) and SMTP_FROM remain.

- lib/entra.ts exposes readEntraAppCredentials(), shared by SSO and mail
- diagnosis drops basic-auth-only causes; hints name the ENTRA_* values
  and warn that an expired secret breaks sign-in and mail together
- admin e-mail test, .env.example, docker-compose, k8s manifests,
  preflight and README updated

Verified against Entra ID with fake values: token error classified,
client secret never exposed, missing ENTRA_CLIENT_SECRET reported.

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
2026-09-26 19:23:05 +02:00
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