Thanks for the hint Todd.
I've replaced it with:
smtp_dns_support_level = disabled
and it's still working as expected.
---
Adam
On 15/07/2024 18:49, Todd Zullinger wrote:
It's probably worth noting that `disable_dns_lookups` has
been deprecated for a long time. The postconf(5) man page
says:
As of Postfix 2.11, this parameter is deprecated; use
smtp_dns_support_level instead.
(Debian 12 has postfix-3.7.11; well past postfix-2.11.)
I don't know if `smtp_dns_support_level` is needed at all
with `smtp_host_lookup = native`. I've never run an MTA
where I wanted DNS lookups disabled, so I don't have any
direct experience.
If it is needed, you'd surely be better off avoiding the
long-deprecated `disable_dns_lookups` parameter which will
just set you up for failure with some future update.
