Tools · Email

Mail server test

Validate MX connectivity, review SMTP handshakes, and inspect advertised capabilities for your sending domain.

Paste the MX host you want to probe. We will contact it directly over SMTP.

Many home networks block port 25. Try 587 (submission) or 2525 if the default fails.

Latest results

Provide a domain and MX hostname to see handshake details and advertised capabilities.