Type your domain and see in seconds whether anyone can send email pretending to be you, and exactly what to fix. • Checks SPF (including the 10-lookup limit) and DMARC (RFC 9989) • Plain-English results, not raw DNS output • Knows 30+ senders: Google Workspace, Microsoft 365, Zoho, Mailchimp, HubSpot and more • Companion generator builds safe SPF + DMARC records to copy into your DNS • Runs in your browser: no sign-up, nothing stored