Tools
Free email tools.
Quick, no-signup utilities for DMARC, SPF, and DKIM. Check how a domain is set up, or build the records you need.
Domain security scan
Run every check at once: DMARC, SPF, DKIM, MTA-STS, BIMI and DNS health for any domain. No signup.
DMARC checker
See how any domain's DMARC, SPF, DKIM alignment, and reporting are set up. No signup.
DMARC record generator
Build a valid DMARC record tag by tag, every option explained, then copy it straight into DNS.
SPF record checker
Look up an SPF record, expand every include, and count it against the 10-DNS-lookup limit.
Email (.eml) analyzer
Drop in an .eml file and see its SPF, DKIM, DMARC and alignment. Runs entirely in your browser; nothing is uploaded.
DKIM record checker
Look up a selector's DKIM public key, check its strength, or probe common selectors to find one.
MTA-STS checker
Validate an MTA-STS setup end to end: the DNS record, the HTTPS policy file, and MX coverage.
BIMI checker
Check your BIMI record, the DMARC enforcement it needs to work, the SVG logo, and the VMC.