DKIMCore
DKIM key and signature oriented validation utilities.
- Reading time:
- 5 min
- Difficulty:
- Intermediate
- Estimated duration:
- 5 min
- Prerequisites:
- None
- Last updated:
- 2026-07-15
- Author:
- empire
Overview
DKIM key and signature oriented validation utilities.
Vendor: DKIMCore
Primary purpose
Validate DKIM-related configuration and keys.
Best for
- DKIM-specific debugging
Common use cases
- Check selector publication
- Validate key material format
Advantages
- Focused on DKIM
Limitations
- Narrow scope outside DKIM
When not to use it
- You need a full DMARC reporting suite
Pricing
Free utilities.
Official website
Inputs and outputs
Typical inputs
- Domain
- Selector / key material
Typical outputs
- Validation results
Privacy notes
- Review each vendor’s data handling before uploading production lists or message content.
Related Learn Articles
Related Solve Articles
- Broken DKIM key rotationKey rotation leaves selectors unpublished or mismatched.
- DKIM body hash mismatchBody modifications invalidate the DKIM body hash.
- DKIM key too shortDKIM key length is below accepted operational guidance.
- DKIM passes but DMARC failsDKIM validates but signing domain does not align for DMARC.
- DKIM public key invalidPublished DKIM key material cannot be used for verification.
- DKIM selector not foundThe selector DNS record cannot be located.
- DKIM signature missingMessages leave without a verifiable DKIM signature.
- DKIM signing-domain mismatchUnexpected d= domain relative to the visible From domain.
- DKIM verification failureReceivers cannot validate the DKIM signature.