DKIM Checker: Verify Your Email Signing in Seconds
Look up your DKIM record and confirm it is published and formatted correctly, so mailbox providers trust every message you send. Instant results.
Free with a Brainito account. No credit card required.
Instant Record Lookup
Fetches your published DKIM record straight from DNS so you see exactly what mailbox providers see.
Syntax Errors Flagged
Catches malformed tags, truncated keys, and broken records that quietly fail authentication checks.
Results in Plain English
Each check explains what passed, what failed, and how to fix it, so no DNS expertise is required.
Frequently Asked Questions
What is DKIM and why does it matter?
DKIM is a cryptographic signature that proves an email really came from your domain and was not altered in transit. Mailbox providers like Gmail check it before deciding whether to inbox your mail, so a broken record hurts deliverability.
What do I need to run a DKIM check?
Enter your domain and the selector your email platform uses, such as google or k1. The checker queries DNS for the matching record and validates it. If you are unsure of your selector, your email provider's setup docs list it.
Is the DKIM Checker free to use?
Yes. It is free after creating a Brainito account. Check your record whenever you change email providers or DNS settings, since those are the moments DKIM most often breaks without anyone noticing.
Confirm your DKIM record is valid before your next send
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