How to check a domain’s MX record
Look up which mail servers handle a domain’s email and in what priority order. Step-by-step, plus how to read the results.
A domain’s MX records decide where its email is delivered. Checking them is the first move when mail bounces or you want to know which provider runs a domain’s email. Here is how.
Read the hosts and priorities
Run a DNS lookup and open the MX records. Each lists a mail-server hostname and a priority number — senders try the lowest number first, with higher numbers as fallbacks. The hostnames often reveal the email provider (e.g. Google or Microsoft), and each should resolve to an A/AAAA record.
Debugging delivery
A missing MX means mail has nowhere to go; a wrong hostname or a priority mistake misroutes it. If email to a domain bounces, confirm the MX records exist, point at the right provider, and their target hosts resolve.
Step by step
Enter the domain in the DNS lookup tool.
Open the MX records and read each server hostname and priority.
Lowest priority number is tried first; higher ones are fallbacks.
Confirm each MX hostname resolves to an A/AAAA record if mail is bouncing.
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