Steffen Nurpmeso via Postfix-users:
> |Before mailing list expansion, both virtual_alias_maps expansion and
> |recipient deduplication happen while an inbound message is written
> |to a queue file.
> |
> |After mailing list expansion, both virtual_alias_maps expansion and
> |recipient deduplication happen while an outbound message is written
> |to a queue file.
> |
> |By default, deduplication happens only for the first 1000 recipients
> |(duplicate_filter_limit = 1000). You can set the limit larger;
> |modern systems should handle 10x or 100x easily.
>
> Ah, i have forgotten to add
>
> mydestination = $myhostname, localhost.$mydomain, localhost,
> lists.$myhostname
>
> Other than that i think i reread VIRTUAL_README from scratch.
> I do not understand otherwise, sorry. (The initial message that
> triggered me was an inbound message.)
I might add, in case that it isn't obvious from the above, that there
is no deduplication across multiple queue files.
If the mailing list generates multiple submissions into Postfix,
then duplicates will be suppressed only within the same queue file.
If you really want useful information from me, then I need to know
what route the duplcated recipients took in terms of queue files.
Wietyse
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