live check
Email Deliverability Checker
Free email authentication checker. Test your domain’s SPF, DKIM, DMARC, MX, BIMI and MTA-STS records and see exactly what to fix so your emails land in the inbox.
Checks MX, SPF, DKIM, DMARC, BIMI and MTA-STS. Don’t know your DKIM selector? Leave it empty and we’ll try the common ones (Google, Microsoft 365, Mailchimp, Brevo, SendGrid…).
more website & email diagnostics
DNS Lookup
Look up A, AAAA, MX, TXT, NS, CNAME, SOA and CAA records for any domain.
SSL Certificate Checker
See issuer, expiry date, covered domains and days left on any SSL certificate.
HTTP & Security Headers
Inspect HTTP headers, redirects and grade your security headers.
SEO Meta Tag Analyzer
Audit title, description, Open Graph, headings and images for any page.