Domain Mechanic

Check a domain's email settings (MX, SPF, DKIM, DMARC and spam lists), explained in plain English.

Domain Mechanic checks whether a domain's email is set up correctly, and explains the results in plain English. Type a domain, or click "Check the website you are on", to see: - MX: where the domain's email is delivered - SPF: which services may send email for the domain - DKIM: whether emails are signed - DMARC: what happens to emails that fail the checks - Blocklists: whether the mail server is on public spam lists Each result says Pass, Warning or Fail. Open the full results on domainmechanic.co.uk for step-by-step fixes and a glossary of every term. Privacy: the extension sends only the domain you check, and only when you click. It does not read pages, history or other tabs. It has no tracking and no adverts.