Arnies free tool

Is your sending domain ready?

Checks MX, SPF, DKIM and DMARC in plain words, and counts how many of your 10 SPF lookups you have used. Free, no login, runs in your browser.

Domain

Add a DKIM selector

Selector

Find it in a sent email: open "show original" and look for s= in the DKIM-Signature line. Leave it empty and we try the common ones.

Lookups go from your browser to Cloudflare's public DNS (Google's as a backup). Nothing is stored or sent to us.

Rules from Gmail, Yahoo and Outlook sender requirements, and the SPF lookup limit in RFC 7208.

Made by @itzSaasified at Arnies.