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Email & DNS tools

DNS lookups and the records that keep mail out of spam: SPF, DKIM and DMARC.

Email & DNS

DNS Lookup

Look up A, AAAA, MX, TXT, NS, CNAME, SOA, CAA, SRV and PTR records for any domain or IP address.

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SPF, DKIM & DMARC Checker

Check a domain’s MX, SPF, DMARC and DKIM records in one go, with plain-English findings and fixes for common mistakes.

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SPF Record Generator

Build a valid SPF TXT record for Microsoft 365, Google Workspace, your own mail server and sending services – with a lookup counter.

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DMARC Record Generator

Create a DMARC policy record step by step – from monitoring (p=none) to full protection (p=reject) – with reporting addresses and alignment.

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DKIM Record Generator

Generate a DKIM key pair in your browser and get the DNS TXT record, the private key and ready-to-use OpenDKIM settings – or turn an existing public key into a record.

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