You're probably familiar with the idea of list expansion in /etc/aliases. Having an alias for owner-listname changes things a little.
The question spawned from here: Postfix/Message_with_300,000+_recips_via_alias_maps
Matthias Andree: > Am 12.06.2009, 18:42 Uhr, schrieb Wietse Venema <wietseporcupine.org>: > > > One final input: be sure to give each alias an owner-alias so that > > Postfix will store the result of alias expansion in new queue > > files. > > > > Otherwise, the result of expansion will not be stored. After failure > > of delivery to one local recipient in the expansion, the whole > > alias will be expanded again when delivery is retried, which is > > something that the other recipients will not appreciate. > > Trying to explain this to an admin at a site I used to work for - where > (aka. in which file and section of Postfix documentation) is this owner-* > companion alias feature documented? In aliases(5). > I have a vague notion of how this works, but postconf(5) on Postfix 2.5.5 > (openSUSE 11.1) isn't particularly elucidating, and neither are > cleanup(8), trivial-rewrite(8) manpages (or qmgr(8), but that's not > concerned with rewriting), nor are virtual(5), generic(5), or > canonical(5) - the best you find is that owner-* and *-request are > treated special and, in a different place (postconf 5) that these bypass > splitting if recipient_delimiter is "-". > > Am I missing documentation or is documentation on this feature too > terse? It is terse. Wietse PS I am joking here. Matthias is an old-time Postfix user and I am always glad to see him contribute. I think the owner-mumble explanation in the 300k alias thread is the most detailed one that has been written down sofar.