Return every email sender account owned by the caller, newest first.
email_domains entry so clients can render domain status (verified, pending, …) without a second round-trip. Warmup analytics (stat_warmup_score, health_score, daily sends) are NOT included here — fetch them separately via GET /api/email/accounts/warmup-analytics.
/api/email/accounts with other verbs. See the sibling page for related operations on the same resource.