Domains

Admin allowlist/denylist of email domains.

📄️List tenant email domains

Returns all known email domains for the tenant (for personalization placeholders and malicious-sender flagging). Requires Admin or TrialAdmin role.

📄️Add an email domain

Inserts a new domain. If a row with the same `domain` already exists the request is a no-op and returns `200` with `{ message }`; otherwise `201` with the new row. Requires Admin or TrialAdmin role.

📄️Delete an email domain

Removes a domain by its `domain` value. Requires Admin or TrialAdmin role.