Outbound & GTM
8 min read
Engineering a 95%+ Email Deliverability Outbound Stack with Clay & Smartlead
Step-by-step breakdown of building a 4-tier waterfall data enrichment workflow in Clay that verifies emails, deduplicates accounts, and syncs directly into Smartlead.
Written by Dorlent Systems Team (GTM Engineering) • Published August 08, 2026
Raw CSV scraping is dead. High-performing outbound infrastructure requires multi-provider waterfall validation (Prospeo -> Datagma -> Hunter -> NeverBounce) before a single sequence email is ever dispatched.
Ensure your Clay webhook only sends records with "Verification Status = Valid" to prevent catch-all addresses from burning your secondary outbound mailboxes.