SPF, DKIM & DMARC checker

Check the three records that prove your email is really from you, with a plain-English explanation of anything that's wrong.

Good to know

Why does it matter?: Gmail and Yahoo require SPF or DKIM for all senders, and DMARC for anyone sending in bulk. Without them, your email is likelier to land in spam, and easier for others to fake.
My SPF has too many lookups: Each include: costs DNS lookups, and more than 10 makes SPF fail. Remove services you no longer use, or replace includes with ip4:/ip6: ranges.
How do I find my DKIM selector?: Open an email you sent, view the original message, and find DKIM-Signature: the s= value is the selector. Enter it after the domain, like example.com s1.

Checking by hand only tells you about right now. Spot Downtime checks your sites around the clock and alerts you by email, Slack or Discord.