On 2026-05-27 10:50, Wietse Venema via Postfix-users wrote:
Ralph Seichter via Postfix-users:
* Wietse Venema via Postfix-users:
Mel P via Postfix-users:
IMHO, that last reinforces the idea that it's time to retire the
unique handling of inet_protocols, or at least change it to
"inet_protocols = all"
That may be so for big providers, but what percentage of Postfix
sites has IPv6 connectivity? Turning on Postfix IPv6 support without
IPv6 connectivity would do no harm for the Postfix SMTP server, but
it would be harmul for the SMTP client.
I might be missing something, but how would the SMTP server supporting
both IPv4 and IPv6 by default be harmful for the SMTP client? And what
is "the" SMTP client in the case you envision?
Turning on Postfix IPv6 support without IPv6 connectivity would do
no harm for the Postfix SMTP server.
Turning on Postfix IPv6 support without IPv6 connectivity would be
harmul for the Postfix SMTP client.
IME worst case there's a few seconds delay when there's a partial
network outage, but fallback is otherwise reliably seamless and
instantaneous.
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