> On Oct 30, 2017, at 12:37 AM, J Doe <gene...@nativemethods.com> wrote:
>
>>> and that this applies to the smtp(8) delivery agent.
>>
>> It states no such thing, and indeed this is not the case.
>
> Oh, perhaps I am mistaken. When I look at that parameter using:
> http://www.postfix.org/postconf.5.html
>
> ...it states: “This is the default limit for delivery via the lmtp(8),
> pipe(8), smtp(8)and virtual(8) delivery agents.”
The parameter applies to the qmgr(8) process which manages
the concurrency of all delivery agents, including smtp(8),
but it is not per-se an smtp(8) parameter. In particular,
overrides of:
default_destination_concurrency_limit
smtp_destination_concurrency_limit
relay_destination_concurrency_limit
...
have no effect when applied to some non-qmgr entry in master.cf,
but since there can only be at most one queue-manager process,
these always go in main.cf. The "<transport>_" prefix matches
the first column in master, not the delivery agent executable.
Thus each instance of smtp(8) (smtp/unix, relay/unix, ...)
is controlled by a separate qmgr(8) override parameter.
--
Viktor.
