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MX lookup: who handles this domain's email?

Enter any domain to see its MX records, in priority order, and which email provider it uses.

Your domain is sent to Cloudflare's public DNS service (or Google's if that fails) to read its public records. Siela doesn't see or keep it.

The short answer

An MX record tells the internet which mail servers accept email for a domain. An MX lookup reads those records, so you can check that your domain can receive mail, or see which provider a company uses. The server with the lowest priority number is tried first.

What the result means

  • Records found: this domain can receive email at those servers.
  • No records: email to this domain will likely fail. Receiving servers also tend to distrust mail from a domain with no way to reply.
  • Priority: a lower number is tried first. Higher ones are backups.

Why it matters for outreach

If you send cold email, set up your sending domain fully before you start: MX so replies arrive, then SPF, DKIM and DMARC so receivers trust you. Checking a prospect's MX also tells you whether they use Google or Microsoft, which can be useful to know before you send.

Questions

What is an MX record?

A DNS record that names the mail servers accepting email for a domain.

What does MX priority mean?

It's the order servers are tried in. The lowest number goes first, and higher numbers are backups.

Why does my domain have no MX records?

It may not be set up for email, or the records may be wrong. Your email provider gives you the exact values to add.

How long do MX changes take to show?

Often minutes to a few hours, but it can take up to 48 hours, depending on the old record's time-to-live.

Find the people worth writing to.

Lead Finder looks for people with a reason to buy, then starts the conversation on LinkedIn, X and email from your own accounts.