DNS Record Generator (SPF, DMARC, DKIM, MX)
Generate RFC-compliant email security and DNS zone records with copy-ready BIND declarations.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. No data is ever transmitted across the network.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
How to Use DNS Record Generator (SPF, DMARC, DKIM, MX)
Type your domain name (e.g. example.com).
Choose DMARC, SPF, MX, or DKIM.
Select enforcement mode (e.g. p=reject for DMARC) and copy the DNS TXT record value.
Frequently Asked Questions
Why is DMARC important for domain deliverability?
DMARC prevents phishing attacks by verifying that sender addresses match authenticated SPF and DKIM signatures, boosting email inbox deliverability.
What is the difference between ~all and -all in SPF?
~all indicates SoftFail (accept but flag non-matching mail), while -all indicates HardFail (strictly reject unauthorized mail).
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