✉️ MX Record Checker
Check a domain’s mail servers, priorities and whether they resolve.
What MX records do
MX (Mail Exchange) records are the DNS entries that tell the internet which servers accept email for your domain. When someone sends a message to [email protected], their mail server looks up these records and delivers to the host with the lowest priority number first, falling back to the next if it is unreachable. No MX records means no email can arrive at all. This tool lists each mail server in priority order and then verifies that every one of them actually resolves to a real IP address.
Reading the results
- All servers resolve, delivery has somewhere to go. If mail still fails, the problem sits with the mail service itself, not DNS.
- A server does not resolve, usually a leftover record from an old provider, or a typo. Senders trying that server will see delays and sometimes bounces. Remove or correct the record.
- One priority used twice, perfectly valid: both servers share the load equally.
Frequently asked questions
Why does my domain show Google or Microsoft servers?
Because your email is hosted there. Google Workspace domains point at Google's mail servers and Microsoft 365 domains at Microsoft's. The checker names the provider when it recognises the pattern, which is a quick sanity check that you are looking at the right setup.
Can I receive email without MX records?
Not reliably. As a historical fallback some senders try the domain's A record, but many do not, and modern practice treats missing MX as undeliverable. If you use email on the domain, publish proper MX records.
I changed mail providers. How long until MX changes apply?
Until the old records' TTL expires in caches around the world, commonly up to a few hours and occasionally a day. During the overlap, mail can arrive at both the old and new provider, so keep the old mailbox readable for a day or two.
MX is fine but my mail lands in spam. Why?
Delivery and trust are different problems. Spam placement is usually about SPF, DKIM and DMARC, the three authentication records that prove a message really came from your domain. Check those next once MX is healthy.