Email Spam Tester
FreeUntestedOur check runs without a key, so we couldn't test this one. It doesn't mean it's down.
Sends a test email through 42 deliverability and spam checks, then returns a scored JSON report.
Example request
curl -s -X POST 'https://email-spam-tester.com/api/v1/inbox?lang=en'
Free tier, in plain English
No signup or key needed. You get a share of a global 100,000-report free pool, then a handful of tests per IP each day for good.
Alternatives in Email
Atomic MailSelf-registers a real email inbox for an AI agent (PoW, no signup) and sends/receives mail via JMAP.FreeBrevoSend transactional and marketing email, SMS and WhatsApp, and manage contacts via one REST API.FreemiumEmailJSSends transactional emails from client-side JavaScript without a backend server.FreemiumImprovMXManages email forwarding aliases and SMTP sending credentials for a custom domain.FreemiumIndiePitcherSends transactional emails with markdown support and manages contact lists for SaaS appsFreemium