RFC 5322 format check. Reject malformed addresses before any network calls. (+5 points)
Verify domain exists and has mail exchange records configured. (+20 points)
Connect to mail server, issue RCPT TO command, verify mailbox exists without sending. (+40 points)
Test with random address to determine if domain accepts all emails regardless of mailbox. (+5 points)
Check against database of temporary/throwaway email services (Guerrilla Mail, Temp Mail, etc.). (+5 points)
Detect info@, admin@, support@, sales@, hr@ addresses. Flag but don't reject -- some role addresses are valid targets. (+5 points)
Verify domain has email authentication records configured. Indicates legitimate email infrastructure. (+15 points)
Self-hosted Reacher provides secondary verification for ambiguous results. Confirms deliverability. (+10 points)
Verify your entire email list before launching outbound campaigns. Remove SKIP tier to prevent bounces.
Periodically verify CRM emails to remove invalid addresses and update confidence scores.
Use verification tier as a lead scoring signal. TIER_1 contacts are higher priority than TIER_3.
API mode for verifying emails at point of capture -- web forms, imports, and integrations.
Clean purchased or scraped email lists before use. Remove disposable, role-based, and invalid addresses.
Continuous verification to catch emails that become invalid over time (job changes, domain expiry).
Everything you need to know about our platform.
Still have questions?
Our team can walk you through the pipeline, pricing, and your use case.