Free email testing tool with AI-powered deliverability scoring. Test spam scores with SpamAssassin, check WCAG accessibility, and verify compatibility across Gmail, Outlook, Apple Mail & 15+ clients. GPT-4o & Claude analyze all results into prioritized fixes. One Docker command setup.
Madeplain explains the document in plain language, surfaces the questions worth asking, and drafts a clear email you can send to get answers — without sounding rude or confused.
Whether you’re validating sign-up forms, cleaning a marketing list, or improving transactional email deliverability, VerifyKit helps you save money, avoid bounces, and keep your sender reputation strong.
