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Kordu Tools

MX Lookup

Look up mail server (MX) records for a domain and identify the email provider.

How to use

  1. 1

    Enter a domain

    Type the domain you want to check, such as example.com.

  2. 2

    Run the lookup

    Click the Lookup button or press Enter to query MX records.

  3. 3

    Review mail servers

    See each MX record sorted by priority (lowest is preferred), along with its IP address and detected email provider.

Frequently asked questions

What is an MX record?
An MX (Mail Exchange) record specifies which mail servers accept email for a domain and in what order of preference. Lower priority values indicate higher preference.
How does provider detection work?
The tool matches the MX server hostname against known patterns for popular email providers. For example, servers ending in .google.com indicate Google Workspace.
Why might no MX records be found?
The domain may not be configured for email, or it may rely on an A record fallback (some older setups). It could also be an invalid or unregistered domain.
Is this lookup private?
The only external requests are DNS-over-HTTPS queries to Cloudflare and follow-up A record lookups. No data is stored or shared.

Discover which mail servers handle email for any domain. This tool

queries MX records via Cloudflare's DNS-over-HTTPS API, sorts them by

priority, and resolves the IP address of each mail server. It also

identifies well-known email providers such as Google Workspace,

Microsoft 365, Zoho Mail, and others based on the server hostname.

Use it to verify email routing, troubleshoot delivery issues, or

check which provider a domain uses. All lookups run in your browser.

Related tools

DNS Lookup

Query all DNS record types for any domain using Cloudflare's DNS-over-HTTPS API.

SPF Record Checker

Look up and validate SPF records to check email authentication for any domain.