Deliverability tools for senders

Validate SPF records and surface misconfigurations in seconds.

Build a publish-ready SPF TXT record for your domain.

Validate DKIM selectors, public keys, and CNAME delegations.

Generate a publish-ready DKIM TXT record and keypair.

Validate DMARC policy and reporting tags in DNS.

Build a publish-ready DMARC TXT record for your domain.

Parse aggregate DMARC XML reports and summarize sources.

Check DMARC enforcement readiness with SPF and DKIM context.

Validate MTA-STS DNS records and HTTPS policy files for your domain.

Validate TLS-RPT DNS records and aggregate report email addresses.

Look up TLSA records and verify DANE DNS configuration for mail servers.

Full MX, SPF, DKIM, and DMARC analysis for any domain.

Validate BIMI records, logo URLs, VMC certificates, and DMARC policy.

Generate a publish-ready BIMI TXT record for your domain.

Convert SVG logos into BIMI-compatible SVG Tiny PS format.

Validate SVG logos against BIMI SVG Tiny PS requirements.

Preview your brand logo in Gmail with and without a VMC certificate.

Preview your brand logo in Gmail with and without a Common Mark Certificate.

Find domains that closely resemble your brand and may be registered for phishing or impersonation.

Instantly verify if an email address is real, disposable, or fake with DNS, MX, SPF, and DMARC checks.

Analyze raw email headers for SPF, DKIM, DMARC authentication, routing paths, and spoofing signals.

Check if an IP address or domain is listed on major free DNS blacklists including Spamhaus and Barracuda.

Check any URL against threat intelligence databases, heuristics, redirect chains, and domain age signals.

Paste any suspicious email for instant threat analysis of authentication, links, urgency patterns, and brand impersonation.

Query any DNS record type for any domain, A, AAAA, MX, CNAME, TXT, PTR, NS, SOA.

Look up and analyze all TXT records, SPF, DMARC, DKIM classified automatically.

Reverse DNS lookup with forward-confirmed reverse DNS (FCrDNS) verification.

Registration, ownership, expiry, and nameserver details for any domain.

Verify DS, DNSKEY, and RRSIG records and the full chain of trust.

See which Certificate Authorities may issue SSL/TLS certificates for your domain.

Validate mail server hostnames, priorities, IP resolution, and PTR records.

Split long TXT records (like DKIM keys) into 255-character segments.

Owner, ISP, ASN, network range, and abuse contact for any IPv4 or IPv6 address.

Verify DNS changes have propagated across 30+ global locations in real time.