Check supported email syntax and look up the domain's mail-routing records. Review the diagnostic before interpreting the result.
Use this tool to catch formatting problems and see whether the domain publishes usable MX records.
Your input is sent to a server or external service to complete this request. Avoid submitting sensitive information.
Use this tool to catch formatting problems and see whether the domain publishes usable MX records.
The API checks an ASCII address pattern and domain labels.
Successful requests show domain mail-routing records when present.
Type an address with a domain, such as name@example.com.
The service checks syntax and requests MX records.
Separate a syntax error, an MX result and a lookup failure.
Email address → syntax and MX diagnostic
Enter name@example.com to check the format, then interpret the MX answer as a property of the domain.
It shows routing for the domain and says nothing about that mailbox.
