DKIM Tools

Set up DKIM effortlessly. Our guided wizard generates secure 2048-bit or 4096-bit RSA keys, auto-creates selectors, and formats strict DNS TXT records instantly.

Validate your DKIM record syntax to prevent deliverability failures. Fetch live DNS records or paste raw strings to detect formatting typos and verify Base64 integrity.

Mathematically verify your DKIM public keys in real-time. Decode ASN.1 DER structures, compute true RSA bit-lengths, and instantiate live .NET cryptographic objects to ensure your p= tag is functionally valid.

Debug your custom DKIM implementation. Apply strict relaxed/simple canonicalization, preview pre-hash payloads, and compute the exact SHA-256 Body Hash (bh=).

Decode your raw DKIM-Signature header instantly. Analyze body hashes (bh=), audit rsa-sha256 algorithms, verify signed headers, and handle RFC line folding.

Lost your DKIM selector? Use our real-time DKIM Selector Checker to auto-discover hidden keys, scan common ESP prefixes, and verify active DNS records instantly.

Instantly repair broken DKIM TXT records. Our automated tool removes illegal whitespace, fixes missing tags, and normalizes quotes to strict RFC standards.

Generate secure DKIM records instantly. Create robust 2048-bit RSA key pairs, get perfectly formatted TXT records, and stop email spoofing with zero data retention.

Validate your DKIM record instantly. Parse live DNS tags, estimate RSA key strength, detect Ed25519 algorithms, and calculate your DKIM security health score.

Check DKIM propagation globally. Concurrently query Google, Cloudflare, and Quad9 to bypass local cache, identify mismatches, and verify your DKIM record is live.

Instantly lookup your DKIM TXT records using global DNS resolvers. Bypass cache, verify global propagation, and reconstruct split 2048-bit keys in milliseconds.

Is your DKIM key crackable? Perform a live mathematical extraction of your RSA modulus length to test cryptographic strength against NIST standards.

Generate mathematically secure RSA private and public keys for DKIM. Supports 2048-bit and 4096-bit keys, PKCS#1/PKCS#8 PEM formats, with zero data retention.

Audit your DKIM record for critical security vulnerabilities. Detect dangerous testing flags (t=y), weak RSA key lengths, and hash collision risks instantly.

Analyze your raw DKIM-Signature header for security vulnerabilities. Audit protected headers (h=), canonicalization (c=), and expiration tags to prevent replay attacks.

Audit your DKIM record at the DNS layer. Trace CNAME delegations, detect 2048-bit string splitting, and diagnose NXDOMAIN errors to ensure DMARC compliance.

Map your domain's email ecosystem in real-time. Execute concurrent DNS queries to discover shadow IT, active SaaS integrations, and eliminate orphaned DKIM records.

Process raw .EML files through a live DKIM authentication pipeline. Dynamically extract signatures, perform real-time DNS fetches, and validate the DMARC chain of trust.

Decode your DKIM record with our real-time structural analyzer. Translate complex DNS tags into plain English, understand your cryptographic architecture, and detect unrecognized syntax.

Ensure DMARC compliance with our live DKIM Alignment Checker. Instantly verify if your Header From domain and DKIM signing domain (d=) align in strict or relaxed modes.