Symptoms How to disable IPv6 on a Postfix Service Node? Resolution Enforcing Postfix to use IPv4 an be done by specifying inet_protocols parameter in main.cf configuration file: Open /etc/postfix/main.cf with text editor (for example, vi) on the Postfix service node. Change inet_protocols value from inet_protocols = all to inet_protocols = ipv4. Restart Postfix service: # …
Continue reading “How to disable IPv6 for postfix service node?”