How to check a DKIM core key record is correct

by Daniel Pham
Published: Updated:

How to check a DKIM core key record is correct? When you add a new domain to the mail server, you will have to set up SPF, DKIM, DMARC records for that domain.

In the series Install Zimbra Mail Server 8.8.12, I showed you step by step how to set up SPF, DKIM, DMARC for mail domain.

However, there are times when you will set DKIM failed, though you have successfully done it before. So how to check if a DKIM core key record is correct?

Check DKIM core key record before configure DNS record

Before you create a DKIM record on DNS public. You can check if it is correct. How will we do it?

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You visit the following website. Scroll down to Check a DKIM Core Key Record.

copy dkim content to this box and bress button check
Copy DKIM content to this box and press button Check.

In this box, copy the contents of your DKIM record to it and click Check.

If you receive a message This is a valid DKIM key record as image below, your record is correct.

this is a valid dkim key record
This is a valid DKIM key record.

Conversely, if it reports an error, you will have to find the error and fix the DKIM record until it succeeds.


Although it is a small trick, however, it helps you a lot in managing an email system.

Personally, I have trouble a few times with the DKIM record, even though I have successfully configured it before.

(This is an article from my old blog that has been inactive for a long time, I don’t want to throw it away so I will keep it and hope it helps someone).

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