Live DNS lookups for SPF, DKIM, DMARC and MX — the records mailbox providers check first. We don't check blacklists here; use a blacklist checker such as MXToolbox for that.
No signup · Real DNS lookups · 20 audits per visitor per day
Authorizes servers to send email on behalf of your domain
Signs your emails so receivers can confirm they came from you (we try common selectors)
Tells receivers what to do with mail that fails SPF/DKIM
The mail servers that receive replies for your domain
Whether you entered a root domain or a subdomain