* Quanah Gibson-Mount <qua...@zimbra.com>:
> One of our customers has an interesting setup where they did the following:
> 
> a) Created 50 users
> 
> b) Added a secondary address for the 50 users to an external server
> with 50 users (So any email sent to user@server also gets copied to
> user@server2).
> 
> c) Created a list with the 50 users as members.  Lists are just a
> simple ldap member: of list.
> 
> If an email is sent to the list:
> 
> The 50 users on the server each get a copy
> 
> The 50 users on the second server get two copies
> 
> I've verified I can recreate this issue with a list of 30 users with
> the same configuration.  I don't see it with a list of 25 users.
> I'm sure there's a postconf key that would control this, but I
> haven't had any luck tracking it down.  Thoughts welcome. ;)

Does the issue persist if a owner-listname alias is created, pointing
to e.g. postmaster?

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