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Email authentication tools

Check your domain's MX, SPF, DKIM and DMARC records. See what's missing and find the next step for a correct setup.

Free No sign-up

example.com

MXInbound mail servers

SPFAuthorized sending servers

DKIMMessage signing keys

DMARCDomain policy and reports

Domain to check

Queries run from your browser via Google Public DNS (DoH); the domain you enter is not stored by us.

Sample result

DNS check results

MX waiting

SPF waiting

DMARC waiting

DKIM selector required

Expand a row to see the full DNS record details. DKIM is published under a selector, so you need to enter one.

About email records

Defines the servers that accept your inbound email. A correct MX record makes sure messages reach your system.

Defines the authorized servers that may send on behalf of your domain. Helps reduce unauthorized sending.

The DKIM record is published in DNS under a selector. To query it you must enter the selector you use.

Your domain's authentication policy and reporting addresses are defined in this record.

Manage sender identity, outbound mail and inbound protection with MailGuard.