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Host or domain name not found. Solution to Name service error for name=example.com Error

Host or domain name not found. Name service error for name=example.com

If you are getting the error above, your e-mail service is most likely trying to send via IPv6.

Follow the steps below to resolve the error.

nano /etc/postfix/main.cf

inet_protocols = all > inet_protocols = ipv4

If you edit it as above and restart the service with the command below, the problem will be solved.

systemctl restart postfix

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