New

• dashboard: show sending IP in email detail view and delivery log #502

Fixed

• dashboard: use system DNS resolver for DNSBL blacklist checks #500
• dns: use system resolver in dns_verification and validate route #501
• worker: suppress Feedback-Id and Cfbl-Address on transactional emails #498
• dashboard: replace IP whitelist with rate-limit on public dashboard ingress #499
• security: restrict dashboard to operator IP and rate-limit API #494
• worker: correct COUNT(*) type from i32 to i64 in domain health analyzer #497
• smtp: use system DNS resolver instead of hardcoded Google DNS #496
• security: apply 6 unmerged security audit fixes ()