DKIM record validator
Paste a DKIM TXT record (the value at <selector>._domainkey.<domain>). We'll grade every tag and estimate key strength.
Paste a DKIM record
Where do I find my DKIM record? Most providers (Google, M365, Mailgun, Postmark, SendGrid) give you the TXT contents to publish at a specific selector — e.g.google._domainkey.yourcompany.com orselector1._domainkey.yourcompany.com. Look up that name in your DNS host and paste the value here.
See also the SPF builder and DMARC validator.
Keep hardening your email
Each record is one layer. Check the rest of yours — every tool is free, no account.
Email security scan
Run all 8 checks at once
SPF builder
Assemble a clean SPF record
SPF analyzer
Count your real DNS lookups
DMARC generator
Build a v=DMARC1 record
DMARC validator
Grade a record you have
DMARC report analyzer
Read a rua= XML report
Header analyzer
Trace a suspicious email
Blocklist checker
Are you on a DNSBL?
BIMI check
Get your logo in inboxes
MTA-STS
Force TLS on inbound mail
TLS-RPT
Get TLS failure reports
DMARC visibility
Ingest your rua= reports
Continuous monitoring
Catch record drift on a schedule