Email security checker (SPF, DKIM, DMARC)

Grade a domain's email security from A to F: SPF, DMARC policy, DKIM selectors, MTA-STS, TLS-RPT and BIMI, with plain-English fixes.

Try . Free, no account needed.

Need this at scale?

The same lookup is one API call at 1 credit / request (one credit is $0.0003 to $0.001 depending on volume), with failed requests free.

cURL

curl "https://api.gridlode.com/v1/domain/email-security?domain=google.com" \
  -H "Authorization: Bearer $GRIDLODE_KEY"

Why does DMARC matter?

DMARC tells receiving servers to reject or quarantine mail that pretends to be from your domain. Gmail and Yahoo require it for bulk senders.