The problem
Enrichment gives you emails. It does not guarantee they will not bounce. One spam trap or toxic domain in a 10,000-send campaign can burn your sending infrastructure for weeks.
The system
- Validate on ingest. Every email entering the warehouse passes through a validation waterfall: syntax check, MX verification, catch-all detection, spam trap screening.
- Re-validate before send. Contacts re-validated on a schedule and immediately before sequence enrollment.
- Bounce feedback loop. Bounce webhooks invalidate contacts and auto-pause campaigns on threshold breach.
Field notes
Validation costs money per row. We validate cheapest-first and escalate only when needed. Coverage dashboards show validated vs. unvalidated counts so reps know what they are working with.