[pfx] Re: Should the configuration upgrade process still append "inet_protocols = ipv4"?

Ralph Seichter via Postfix-users <[email protected]> Mon, 25 May 2026 22:08:43 +0200
Newsgroups gmane.mail.postfix.user
Message-ID <[email protected]>
* Mel P via Postfix-users:

> From my own MX log data, I observe 20-25% of "legitimate" mailhosts
> connecting over IPv6. "Legitimate" here meaning those hosts that get
> past postscreen's bot countermeasures and DNSBLs.

I wonder if that number might be skewed, to a degree? Servers with both
IPv6 and IPv4 connectivity need not use IPv6 as their first option when
trying to establish an outbound connection.

-Ralph
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