web network-tools
DKIM Record Checker
Verify that your domain's DKIM public cryptographic key is published properly in DNS so email recipients can authenticate your digital signature.
Queries public DNS.
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How to Use DKIM Record Checker
1
Enter Domain
Type your domain name.
2
Enter Selector
Enter your DKIM selector (e.g. google, k1, default, s1).
3
Verify Key
Inspect the public RSA key, key length (1024-bit or 2048-bit), and validity.
About DKIM Record Checker
Queries `[selector]._domainkey.[domain]` TXT records to confirm publication of the public cryptographic key matching private signing keys.
Supported Formats
DKIMDNS TXT
Operational Limits
- •Requires knowing your sending provider's DKIM selector
Key Features
- Lookup by custom selector (e.g. google._domainkey)
- RSA key bit length analysis (flags weak 1024-bit keys)
- Validates v=DKIM1 and p= public key strings
- Google & Microsoft 365 presets
Frequently Asked Questions
A selector is an identifier assigned by your email provider (like 'google' or 'k1') that allows you to publish multiple DKIM signing keys on a single domain.
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