v1.50.91 – v1.50.104 — 2026-08-19

• feat(audit,dkim): audit log CSV export + DKIM fleet overview (1.50.98)
• feat(dashboard): TLS certificate expiry per node in system health widget (1.50.103)
• feat(diagnostics): TLS cert expiry and PTR/reverse-DNS checks (1.50.104)
• feat(diagnostics): Test-Mail-Funktion auf der Diagnose-Seite — sendet eine HTML-Testmail über den lokalen Postfix-Bypass-Port (10026) direkt aus der UI; Absender und Empfänger frei wählbar, Ergebnis wird inline angezeigt (POST /api/v1/system/test-mail) (1.50.92)
• feat(diagnostics): test mail via Postfix bypass from Diagnostics UI (1.50.92)
• feat(dkim): DKIM key age alert — daily scheduler check + configurable threshold (1.50.93)
• feat(domains): DNS Health Check — batch SPF/DMARC/DKIM check for all domains (1.50.100)
• feat(mailfilters): export and import for mail filter rules (1.50.95)
• feat(mailqueue): deferred queue analysis — categorize delay reasons (1.50.101)
• feat(mailqueue): sender/recipient search filter (1.50.102)
• feat(rbl): RBL IP Lookup tool — live DNSBL check from the UI (1.50.99)
• feat(reporting): mail heatmap — 7×24 weekday/hour grid on Reporting page (1.50.94)
• feat(reporting): top senders, top spammers, spam analytics (1.50.96)
• feat(webhooks): test delivery button (1.50.97)
• release: update changelog pill ranges for v1.50.100
• release: update changelog pill ranges for v1.50.101
• release: update changelog pill ranges for v1.50.102
• release: update changelog pill ranges for v1.50.103
• release: update changelog pill ranges for v1.50.95
• release: update changelog pill ranges for v1.50.96
• release: update changelog pill ranges for v1.50.97
• release: update changelog pill ranges for v1.50.98
• release: update changelog pill ranges for v1.50.99