Free MX lookup
Look up the MX (mail exchange) records for any domain. MX records tell senders which servers accept email for a domain — useful for diagnosing deliverability issues or identifying who hosts a company's mail.
What is an MX record?
An MX (Mail Exchange) record is a DNS entry that tells the internet which server to deliver email to for a given domain. Each MX record has a priority (lower = preferred) and an exchange (the hostname of the mail server).
Common uses
- Check if a domain accepts mail. No MX records = the domain can't receive email.
- Identify the mail provider. Servers ending in
google.commean Google Workspace;outlook.commeans Microsoft 365. - Diagnose deliverability. Misconfigured MX records cause bounces and spam-folder placement.
What to do next
MX lookup is the first step in email validation. To confirm whether a specific mailbox on that domain exists, you need to ping the mail server with SMTP. Our bulk email verifier does that for whole CSVs without you needing to know SMTP.
Need to verify 10,000 emails at once?
Bulk email verifier checks every address against the real mailbox, rescues catch-alls, and returns a clean CSV. No subscription — pay per credit, with auto-refunds on uncertain results.
Other free tools
- Email syntax checker — Validate one email address
- DNS health check — SPF, DKIM, DMARC, MX
- Email extractor — Pull emails out of text
- Disposable email check — Detect temp / throwaway emails