MUST BE USED to auditer la delivery health d'un domaine email avant ou pendant une campagne outbound — DNS records (SPF / DKIM / DMARC / BIMI), warm-up status, blacklist check, MX records, deliverability score, bounce rate observed (si logs fournis), reputation signals. Use PROACTIVELY whenever un caller dit "vérifier deliverability", "audit DNS email", "SPF/DKIM check", "domain warm-up", "bounce rate trop haut", "campagne outbound qui drift en spam", "soft bounce inflation", "Lemlist/Smartlead delivery report", ou avant de lancer outbound-machine Step 7 launch. NE PAS déclencher pour la rédaction des emails (utiliser @sales-writer + skill cold-outreach-b2b), la qualification des leads (utiliser @sales-prospector), le scan de credentials API (utiliser hook credential-scanner), ni le pilotage de la campagne (utiliser @sales-crm).