Free · runs in your browser
SMTP Connection Tester
Test host, port, and TLS handshake.
How it works
SMTP Connection Tester
Test host, port, and TLS handshake. Runs in your browser — you can email the result.
Results appear here after you click Run.
Ready to send from your product? MailShrine Developer API uses the same DNS, webhooks, and SMTP patterns this tool inspects.