DKIM Validator

DKIM Checker

Validate DKIM public key records across popular selectors like google, selector1, and k1.

Popular selectors:
Test domains:

How It Works in 3 Simple Steps

01

Specify Selector & Domain

Enter the DKIM selector (e.g. google, selector1) and your domain.

02

Query DNS Key

Resolves selector._domainkey.domain.com to check public key format.

03

Key Bit Length Check

Confirms key strength (1024-bit vs modern 2048-bit encryption).

Pro Tips for Maximum Performance
  • Rotate DKIM keys every 6 to 12 months for enterprise security.
  • Make sure your ESP actually signs outgoing headers with the matching selector.

Frequently Asked Questions

A selector tells the receiving server where to find the specific public key used to sign that message.

1024-bit keys are considered legacy and susceptible to spoofing; 2048-bit is current security best practice.

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SPF Checker

Validate an SPF record, count its DNS lookups against the limit of 10 and catch the mistakes that break authentication.

Want Guaranteed Pipeline Without Running Tools Manually?

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