Online bulk email validator

The tool validates bulk email lists by applying layered checks to each address. It accepts large CSV/TSV uploads with a single email column or a mapped field, normalizes whitespace and case, and returns per-address statuses such as valid, invalid, or risky. It is designed for marketing teams, data hygiene managers, and CRM admins performing list cleanses prior to imports or campaigns.
Core checks include syntax verification using RFC-compliant patterns, domain DNS/MX checks, and risk signals like disposable or role-based addresses. Optional advanced checks use domain-level signals and catch-all heuristics to estimate deliverability probability. The tool produces a deliverability score and reason codes for each address, and aggregates metrics such as invalid rate, disposable rate, and deduplicated counts. Outputs can be exported in CSV or JSON.
Edge cases include handling malformed rows, missing emails, and rate limits on DNS lookups; results are designed for auditing and segmentation rather than mailbox access.