[ Free toolkit ]
Free email authentication tools.
Check, validate and generate DMARC, SPF and DKIM records, then analyze aggregate reports and email headers. 19 tools, no signup, no backend.
Check
DMARC Checker
Look up and explain any domain's live DMARC record.
Open toolSPF Checker
Validate your SPF record and check the 10-lookup limit.
Open toolDKIM Lookup
Verify a DKIM selector is published and the key is valid.
Open toolBIMI Record Checker
Check a BIMI record and whether the logo will actually display.
Open toolMX Lookup
See a domain's mail servers and whether the setup is valid DNS.
Open toolCNAME Lookup
Follow a CNAME chain and catch a dangling target before someone else does.
Open toolFull Domain Health Scan
Run every email security check at once and get one score.
Open toolMTA-STS & TLS-RPT Checker
Check your TLS policy record, policy file and TLS reporting.
Open toolBlacklist & DNSSEC Checker
Check your mail server IPs on spam blocklists and see DNSSEC status.
Open toolGoogle & Yahoo Sender Check
Pass/fail against the Gmail and Yahoo bulk-sender rules.
Open toolDNS Propagation Checker
Look up any record across Cloudflare, Google and AliDNS side by side.
Open toolGenerate
DMARC Generator
Build a valid _dmarc TXT record with guided options.
Open toolSPF Generator
List your sending sources and generate a correct v=spf1 record.
Open toolDKIM Record Generator
Generate a DKIM key pair and the TXT record to publish, in your browser.
Open toolSPF Flattener
Turn includes into IP ranges to get under the 10-lookup limit.
Open toolBIMI SVG Converter
Convert your logo SVG to the Tiny-PS format BIMI requires.
Open toolAnalyze