MX and Email DNS Lookup

MX and Email DNS Lookup: what it is for

Enter a domain or an email address and see the MX records with the priority and IP of each server, which service receives the email (Google Workspace, Microsoft 365, Zoho, Proton, Yahoo and others) and a check of the three protections against spam and spoofing: SPF, DKIM and DMARC, with the DMARC policy in use. The ring shows the 0 to 4 score of the domain's email setup.

Everything is queried in public DNS, straight from your browser.

How to use

1. Enter the domain or the email.
2. If you know it, enter the DKIM selector.
3. See the service, the servers and what is missing.

When to use it

• Find out whether a company uses Google or Microsoft for email.
• Check SPF and DMARC after setting up a domain.
• Understand why your emails go to spam.

Frequently asked questions

What is an MX record?

It is the DNS record that says which servers should receive a domain's email. The priority number sets the order: the lowest is tried first and the others are backups.

What are SPF, DKIM and DMARC for?

They are the three protections that prove an email really comes from your domain. SPF lists who may send, DKIM signs each message and DMARC says what to do with emails that fail the checks. Without them your messages land in spam more often and the domain is easy to spoof.

Why is DKIM shown as not found?

DKIM lives at an address with a name (selector) chosen by the provider, such as google._domainkey or selector1._domainkey. The tool tests the most common selectors. If your provider uses another one, enter it in the optional field.

Which DMARC policy should I use?

Start with p=none just to receive reports, then move to p=quarantine (send to spam) and finally p=reject, once you are sure all your legitimate mail passes SPF and DKIM.

Is it really free?

Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 are free.

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