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DNS generators

SPF Record Generator

Build a valid SPF TXT DNS record for your domain. Select your authorized senders and copy the result.

DKIM Record Generator

Generate the DNS TXT record for DKIM email authentication. Paste your public key and configure your selector.

DMARC Record Generator

Create a DMARC policy for your domain. Configure enforcement, reporting, and subdomain policies.

SPF Flattener

Collapse nested SPF includes into a single record that uses only IP addresses — zero DNS lookups, no 10-lookup limit.

Checkers

Email Header Analyzer

Paste raw email headers to visualize the delivery path, analyze authentication results, and identify delays.

Email Health Checker

Enter any domain to check its SPF, DKIM, and DMARC email authentication in real time. Free, no account needed.

Blocklist Checker

Check any domain and its mail server IPs against major DNS blocklists like Spamhaus, SpamCop, and Barracuda. Free, no account needed.

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Need a DNS check today?

Tools

SPF Record Generator

DKIM Record Generator

DMARC Record Generator

SPF Flattener

Email Header Analyzer

Email Health Checker

Blocklist Checker

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LitInboxes

The monitoring-first deliverability suite. Catch DNS drift, blocklist listings, and reputation drops before they cost you the inbox.

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Ecommerce brands
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SaaS and transactional email
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