Check if a domain can be spoofed.
Run MX, SPF, DMARC, DKIM selector, BIMI, MTA-STS, and TLS-RPT checks from one page. The report explains what is strong, what is missing, and exactly what to fix next.
DNS and policy lookups only. No account required.
Domain posture
DMARC enforcement, SPF strictness, MX hygiene, and reporting records in one score.
Selector lookup
Check common DKIM selectors or paste the selectors used by Google Workspace, Microsoft 365, or your mail gateway.
Plain-English fixes
Every warning includes the next change to make, useful for admins and students learning email security.