What I am looking for is pretty simple. How to get it to work with "inet_protocols = all" like my existing server is currently set up to do and not be limited to ipv4 only.

And it is already set to use 127.0.0.1 so why it is using [::1] instead when the old server uses 127.0.01, that is part of the mystery. The configs are exactly the same yet they operate differently.

I want to know why. If you don't know and understand the root cause of something that is not a good position to be in going forward. Good enough is not good enough...

On 6/28/24 00:40, Ralph Seichter via Postfix-users wrote:
* Curtis J. Blank via Postfix-users:

I would like to get some insight as to the cause and correct
configuration to use. [...]
Maybe it is simply too early in the morning for me to get your point,
but what insight are you looking for, exactly?

You already found out that localhost does not necessarily resolve to
127.0.0.1 if both IPv4 and IPv6 are used. That's not a problem. If you
do need to make the distinction, you can be explicit by using either
[127.0.0.1] or [::1] in your settings. Does this help?

-Ralph
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