How to use it
- 1
Enter the sender domain without protocol.
- 2
Enter the DKIM selector from your mail provider settings.
- 3
Review DKIM record count, key type, and p= public key presence.
What the tool can do
- Checks TXT record at selector._domainkey.domain.
- Extracts DKIM tags and flags an empty p= value.
- Does not fake validation of real email signatures.
Common use cases
- Verify DKIM publication after mail-service setup.
- Find an empty or incomplete DKIM key.
- Prepare a domain for DMARC alignment.
How it works inside
The check is limited to DNS TXT and does not analyze SMTP headers.
Status reflects record-publication quality, not final deliverability.
Questions and answers
Where do I find the selector?
In your mail provider settings: Google Workspace, Mailgun, SendGrid, and similar services.
Does DKIM guarantee delivery?
No. DKIM is only one part of authentication alongside SPF, DMARC, and sender reputation.