From: Wietse Venema (wietseporcupine.org)
Date: Thu May 01 2008 - 05:54:41 CDT

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m.c.wilkinsmassey.ac.nz:
> > You need to add one entry:
> >
> > owner-it-customers-pn-outgoing: userexample.com
> >
> > where userexample.com is the receiver of non-delivery notifications.
>
> Hi Wietse,
>
> Thank you for your quick reply. Phew, hope this fixes it, certainly
> feeling a bit of heat around here from this botch up.
>
> So I did as you say (and now after googling a bit more I see it is all
> over the web, I should have paid more attention) and when I do a
> delivery to my test list all is well. Although it was before with my
> test list!
>
> Do you think me admitting that line was *the* problem, or it was just
> something wrong you noticed? Basically I am trying to get a warm
> fuzzy feeling that this isn't going to happen again ;-)

The owner-listname alias forces Postfix to create a new queue file
for the mailing list recipients, with one status record per recipient.
Thus, deferral of one recipient does not cause the whole list to
be deferred and retried.

The owner-listname alias is required in any case, so that senders
don't get all the non-delivery notifications. Instead, they are
sent to a person who can actually fix the problem, for example by
removing dead addresses.

        Wietse

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