Email verification and validation for signup, CRM, lead and outreach agents: RFC syntax, live DNS mail routing (MX, null MX, implicit MX), 9,000+ disposable/throwaway domains, role addresses (info@, sales@), free providers, typo suggestions (gmial.com to gmail.com) and the domain SPF/DMARC setup. One verdict: deliverable, risky or undeliverable. Domain lookups cached for speed.

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