On Mon, Aug 28, 2023 at 09:01:35PM +0200, Étienne Miret via Postfix-users wrote:
> Anyway, I promised a documentation patch that would make this more
> explicit, here it is! Sorry it took me a little long to do it, as I have
> been busy on other issues.
The documentation patch seems to suggest that there are potential
futures in which the parameter also restricts non-SMTP message ingres,
or even delivery after alias expansion for addresses not listed in the
table.
However, neither eventuality is at all likely. My take is that it would
not be an unwelcome breaking change to apply the table in any context
other than SMTP ingres.
Therefore, if the documentation is to make to make the scope even more
explicit, it should hedge the language in "For now, ...". Just say it
like it is: the table is used to reject unwanted local SMTP recipients.
One might, for example, reject mail to "root", "bin", "daemon", ... from
outside, but allow local cron jobs to notify appropriate mailboxes
(typically aliased), which means filtering out some accounts:
main.cf:
local_recipient_maps =
pipemap:{
pcre:{{/^"(.*)"(?:@[^@"\\]+)?$$/ $$1},
{/^(.*?)(?:@[^@"\\]+)?$$/ $$1}},
pcre:{{/^(?:root|bin|daemon)$$/ :},
{/(.*)/ $$1}},
unionmap:{proxy:unix:passwd.byname $alias_maps}
}
--
Viktor.
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