DKIM Checker Tool (Free)

This is a simple yet effective free DKIM checker tool that allows you to check the validity of DKIM (DomainKeys Identified Mail) records online. All you need to do is enter your email domain, DKIM selector or name, and click the "Check DKIM" button. The tool will check for the presence of TXT or CNAME DNS records for your domain.

More details on how to use the tool and the importance of SPF/DKIM in email delivery are provided below the form

Dkim Checker Tool






Read below on what is a DKIM selector and example.

Privacy Notice: We do not store or log any data entered in the form. Only you can see the text you enter in the form.

How to Check for DKIM Records

Your SMTP or email service providers will usually provide you with two DKIM texts to add to your DNS records: the DKIM Name and DKIM Value. To minimize false errors, we’ve added the option to check either of these two records. You can select "Value" and check, and if that doesn’t work, try selecting "Name" instead.

  • DKIM selector or Name: While not all providers follow this pattern, the DKIM selector or DKIM name typically contains the term "_domainkey". Here is an example of DKIM Selector: b33e5nytjmlk67jn._domainkey.amazonses.com. If you are using an email marketing platform like Mailchimp, SendGrid, Aweber, MailerLite, etc. You will find these records in your profile or account section.
  • DKIM Value: This usually contains the word "dkim". For example: ccbq323bebn66mcc.dkim.amazonses.com.

Important: Make sure you enter the full record, which should include the root domain URL at the end. For example, use b33e5nytjmlk67jn._domainkey.myemailtools.com not b33e5nytjmlk67jn._domainkey or b33e5nytjmlk67jn alone. If your DKIM name is simply "default", the full DKIM name should be default._domainkey.example.com.

Importance of DKIM Records in Email Marketing

Email clients and service providers like Gmail, Yahoo Mail, Outlook, Zoho Mail, iCloud Mail, Proton Mail, and others use DKIM records to verify whether an email was sent from the domain it claims to have originated from. For example, if you receive an email from john@example.com, Yahoo Mail will use DKIM records to verify that the actual sender is the owner of "example.com" and not someone else impersonating "example.com". Without DKIM records, your emails may end up in the spam folder of the receiver or fail to be delivered entirely.

Google emphasizes in this article that it requires DKIM to be enabled for any domain sending emails, as Gmail servers use it to verify that the domain owner actually sent the email.

Important Info:

Gmail has published a report indicating that it blocks over 100 million spam emails every day using TensorFlow ML. The report says that Gmail can now block spam emails that were previously difficult to detect, including spam messages embedded in images, hidden content, and messages from new domains pretending to be legitimate by including a few spammy messages alongside high-traffic legitimate content.

Therefore, adding DKIM and SPF records is only part of the many measures you should take to reduce the chances of your emails going to the spam folder.