Check whether a domain can receive email by looking up its MX records — the mail servers it points to.
MX records are the DNS entries that tell the internet which servers handle email for a domain. When you send an email to [email protected], the sending server looks up the MX records for example.com and delivers the message to the server with the lowest priority number. If there are no MX records, the domain cannot receive email.
This tool runs checkdnsrr and getmxrr from the server side. It accepts either an email address (it extracts the domain) or a plain domain. The result shows whether MX records exist and lists the mail servers in priority order.
The check tells you whether a domain is configured to receive email, not whether a specific mailbox exists. It is useful for verifying DNS configuration, debugging delivery issues and checking whether a domain you are about to email actually has mail infrastructure.
No. It tells you if the domain can receive email at all. Whether a specific mailbox exists requires an SMTP check, which this tool does not do.
The lower the number, the higher the priority. The sending server tries the lowest-priority MX first and falls back to higher numbers if it fails.
For redundancy. If the primary mail server is down, the sending server tries the next one.
Technically, if it has an A record, some servers will try to deliver to the IP directly. But in practice, no MX records means no reliable email.
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