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MX lookup

List the mail servers that receive email for a domain, in priority order.

More free tools

Check the rest of your setup

Blacklist checkerSee if a domain or IP is listedSPF checkerValidate your SPF recordDKIM checkerConfirm your DKIM signatureDMARC checkerReview your DMARC policySpam word checkerScan your copy for trigger words

Found a problem?
We will check the rest.

Book a deliverability audit and we will look at every domain and mailbox you send from.

Book a deliverability audit
Deliverability audit

Find out what is costing you replies.

Thirty minutes on a call. We go through your domains, mailboxes and sending with you, and name what is putting your replies at risk.

For senders on Google, Microsoft, Azure and custom SMTP

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