What we check
34 checks, five areas, one grade.
Every check has an explainer with what it looks at, why it matters, and the exact change that fixes it.
Whether someone can send mail that looks like it came from you.
Certificate & HTTPS
Whether visitors reach you over a valid, modern encrypted connection.
Security headers
Instructions your pages send that browsers enforce for free.
DNS hygiene
Whether your domain's plumbing is redundant, signed and tidy.
Reputation
Whether public blocklists or certificate logs have flagged your domain.