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I'm trying to change the source IP of my mailing server from IPv6 to IPv4.

I'm running Debian 6.0.7 with Postfix 2.7.1 mail service and ISPConfig

I found lots of forums saying that is easy as change the parameter smtp_address_preference = any to smtp_address_preference = ipv4 in /etc/postfix/ config file, but I can't find this parameter in that file, and if I run postconf smtp_address_preference command it prompts smtp_address_preference: unknown parameter.

I tried adding it and reloading the service with no luck... Can anyone tell me what I'm doing bad?


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closed as off-topic by HopelessN00b Mar 8 at 18:51

  • This question does not appear to be about server, networking, or related infrastructure administration within the scope defined in the help center.
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1 Answer 1

up vote 0 down vote accepted

smtp_address_preference was a part of the 2.8 update

you should look into: inet_protocols = ipv4

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