How the lookup works
When you press Look up, your browser sends one DNS query for the domain's MX records to Cloudflare's public resolver over HTTPS (DNS over HTTPS, JSON format). The answer comes straight back to your browser. Volt Ghost doesn't receive, log or store the domain you type. Then the domain is compared, locally, with the same list of about 10,000 disposable domains that our disposable email checker uses.
Reading the results
Each row is a mail server, ordered by priority (lowest first). Where the host name clearly belongs to a big provider, such as Google Workspace, Microsoft 365, Proton, Zoho or Cloudflare Email Routing, we name it so you don't have to guess. That label comes only from the host name, so treat it as a hint.
| No MX records | The domain doesn't publish mail servers. It may not accept email at all, or it relies on the older A-record fallback. |
| Domain not found | DNS says the domain doesn't exist (NXDOMAIN). Check the spelling. |
| Disposable | The domain is on the public disposable-email list, whatever its mail servers are. |
Why people check MX records
Site owners use MX lookups to spot sign-ups from domains that can't receive mail at all, which is common in bot traffic. Email senders use them to debug bounces: if a domain's MX points at a host that no longer exists, mail will bounce no matter what you do. And people who just got an email from an unfamiliar domain use them to see whether the domain is run by a real mail provider. For Volt Ghost's own domains, you'll see Cloudflare's mail servers, because our inboxes receive mail through Cloudflare Email Routing.
Questions
What is an MX record?
An MX (mail exchanger) record is a DNS entry that tells other mail servers where to deliver email for a domain. A domain with no MX record usually can't receive email, although some fall back to their A record.
Who sees the domain I look up?
Your browser asks Cloudflare's public DNS-over-HTTPS resolver (cloudflare-dns.com) directly. Volt Ghost's servers never see the query. Cloudflare's resolver privacy policy applies to that request.
Can MX records prove an address is disposable?
No. They show where mail goes, which is a strong hint (many temp mail domains share the same few servers) but not proof. That's why we also check the domain against the public disposable-domain list, and why a 'Not listed' result is never a guarantee.
Why does the priority number matter?
Senders try the server with the lowest number first and fall back to higher numbers if it's unavailable. Equal numbers share the load.