What Is Causing This Error?
SMTP error 543, “Routing server failure,” typically occurs when the email server is unable to route an email to the intended recipient’s domain.
This error can occur due to various reasons, including DNS issues, misconfiguration of routing settings, or problems with the recipient’s email server.
Resolving the Error – Solution
To fix this error, we recommend checking that you’ve properly added the required DNS records your SMTP server provides. Most email service providers require users to add DNS records as a means of verifying domain ownership and improving email deliverability.
If the DNS records are missing or incorrect, you’ll likely encounter this error. So review your DNS settings and update the records accordingly.
Another solution to this error is to check the routing configurations on your email server to ensure they are set up correctly. Make sure that the server is not misconfigured to route emails to an incorrect or non-existent recipient.
That’s it! Now you know the causes of SMTP error 543 and how to resolve it.
If you’d like to learn how to troubleshoot other common errors, check out the following tutorials: