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DKIM Checker

Verify your DKIM TXT record by selector. Confirm that your DKIM public key is published correctly to improve email authentication and deliverability.

Location
<selector>._domainkey.<domain>
DKIM is selector-based.
Key tag
p= (public key)
A missing p= breaks DKIM.
Waiting for input
Enter a domain, then press Check
How to Use

Use DKIM Checker in 4 Steps

01
Enter domain
Type the domain you send email from (e.g. example.com).
02
Enter selector
Use the selector provided by your email service (e.g. google).
03
Check DKIM
We query <selector>._domainkey.<domain> for a v=DKIM1 TXT record.
04
Confirm publish
Make sure the record exists and includes a valid p= public key.

What is DKIM Checker?

DKIM Checker helps teams verify dkim selector and public key record. This page is built for production troubleshooting, migration validation, and repeatable change verification workflows.

When to Use DKIM Checker

  • During pre-change validation to baseline expected behavior
  • During active incidents to isolate likely root-cause signals
  • During post-change verification to confirm remediation success
  • During audit/compliance reviews where reproducible evidence is required

How to Interpret Results

Run this tool with clean input, compare output with known-good state, and cross-check adjacent dependencies. Avoid single-signal conclusions when resolver variance, provider policy, or caching windows may influence observations.

Operational Recommendations

  1. Validate input formatting and scope before execution.
  2. Re-run checks from shared URLs for team handoff consistency.
  3. Confirm final conclusions with authoritative provider logs.
  4. Document changes with before/after evidence for incident timelines.

DKIM Checker in EMAIL Workflows

Use this route as a first-pass check in your email diagnostics stack. Then continue with related tools to validate surrounding layers and prevent false positives from partial visibility.

Frequently Asked Questions

What is a DKIM selector?
A selector is a label used to locate the DKIM public key in DNS, like selector1._domainkey.example.com.
Where do I find my DKIM selector?
Your email provider shows the selector when you enable DKIM. Common selectors include google, mail, selector1, and s1.
Can I have multiple DKIM records?
Yes. You can have multiple selectors, which is useful for key rotation or multiple providers.
Why doesn't my DKIM record show up?
Common causes include using the wrong selector, publishing the record under the wrong domain, or DNS not updated yet.
How long does DKIM take to propagate?
It depends on TTL and caching. Many changes appear within minutes to hours, but some resolvers may take longer.

Related Tools

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SMTP Test
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Selector Examples
google
selector1
mail