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Resolved: 550 DKIM verification error

by | Oct 22, 2021

Resolve 550 DKIM verification error with help from our skilled Support Techs.

At Bobcares, we come similar queries as a part of our Server Management Services.

If you have been having trouble with this specific error, head on to find out what our Support Engineers have to say.

What is DKIM?

DKIM is an email authentication tool that enables a receiving mail server to verify whether the incoming mail is authentic for the sender domain. Moreover, DKIM adds a cryptographic signature to each outgoing email. This enables the receiving server to verify and accept the sent email.

An error is reported in scenarios when the receiving mail server is not able to the DKIM signature is invalid, outdated or missing in the public DNS records of the domain.

What is a 550 DKIM verification error?

A 550 DKIM verification error is reported when an external service for DKIM validation reports that the DKIM is invalid as the public key is not available after DNS lookup.

The error also occurs when the public DKIM key does not match the private key in the sender email server. Regardless of the reason behind the error, our Support Techs are here with an easy resolution.

What causes the 550 DKIM verification error?

This error may pop up due to any one of the following reasons:

  • DNS service isn’t configured accurately.
  • The mail domain name is non-existent.
  • DKIM related DNS resource records are broken or have been removed.

How to resolve 550 DKIM verification error?

  1. First, make sure the real domain name is used to send an email.
  2. Next, the domain needs globally resolved to a correct IP. In case a different IP is found in the global DNS search, change the DNS settings in the domain.
  3. Then, verify that all DKIM related DNS resource records are within the domain zone.
  4. After that, disable and enable mail signing via DKIM in cPanel.
  5. Next, wait patiently during the DNS propagation period. The changes are loaded, applied as well as synchronized by DNS during this period. It may take up to 48 hours.
  6. Finally, check the sending server’s DKIM configuration at this link.

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Conclusion

At the end of the day, we learned how to easily resolve the 550 DKIM verification error under the guidance of the skilled Support Team at Bobcares.

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