Article ID: 125908, created on Jun 17, 2015, last review on Mar 31, 2016

  • Applies to:
  • Plesk Automation 11.1
  • Plesk Automation 11.5
  • Plesk for Linux/Unix


How to disable IPv6 on a Postfix Service Node?


Enforcing Postfix to use IPv4 an be done by specifying inet_protocols parameter in configuration file:

  1. Open /etc/postfix/ with text editor (for example, vi) on the Postfix service node.

  2. Change inet_protocols value from inet_protocols = all to inet_protocols = ipv4.

  3. Restart Postfix service:

    # /etc/init.d/postfix restart

It defines what protocols Postfix will use, when it makes or accepts network connections, and also controls what DNS lookups Postfix will use, when it makes network connections.

For additional information, please, check Postfix documentation.

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