Free tool
MX Record Lookup
Does this domain accept mail at all? A live DNS lookup of its mail exchange records. Nothing is sent — the query answers only.
Enter a domain
Type the domain you want to check.
Look up records
A live DNS query for MX and A records.
Read the answer
Records found — or none. That's the whole verdict.
The lookup, drawn
One query, two possible outcomes: records found and the pipeline proceeds to the SMTP probe, or no records and the verdict stops with mx_not_found.
Related free tools
Each tool checks exactly one thing. To run the full pipeline — MX lookup, live SMTP probe and catch-all detection with a reason and a score — use the API.