Email Spam Tester
HTTPS CORS Free
Send a test message and get a spam score, 41 checks with RFC citations and a fix plan
API Endpoint
https://email-spam-tester.com/api-docs/More Email APIs
Email address validation
HTTPS CORS ? apiKey
Check a domain's SPF, DKIM, DMARC and MX with a graded shareable report
HTTPS CORS Free
Email for AI agents: programmatic inbox creation and send/receive over JMAP
HTTPS CORS ? apiKey