[Mailman-Users] duplicates

[Mark Sapiro]

On 03/18/2015 02:46 PM, Marco Stoecker wrote:
> 
> I have Mailman up and running. I just sent an e-mail to 5 lists and
> the e-mail came duplicated to the recipients. I checked the header and
> the only difference is the following:
> 
> 1. Header:
> X-Spam-Status: No, score=-1.5 required=5.0 tests=BAYES_00
> autolearn=unavailable version=3.3.1
> 
> 2. Header:
> X-Spam-Status: No, score=-1.5 required=5.0 tests=BAYES_00
> autolearn=ham version=3.3.1


I'm confused. Are you looking at all the headers or just those your MUA
shows you by default?

If you look at all the headers, at a minimum, some Received: headers and
Mailman's X-BeenThere: header should be different.


> How can a avoid duplicates in future? What is the reason?


Normally, if you cross post to 5 lists, people who are members of more
than one of the lists will receive a copy of the post from each of the
lists of which they are members.

The only way to avoid this is by using the Non-digest options ->
regular_exclude_lists feature. For example, if you regularly post a
single post to list1, list2, list3, list4 and list5, you could put
list2, list3, list4 and list5 in list1's regular_exclude_lists, and put
list3, list4 and list5 in list2's regular_exclude_lists, and put list4
and list5 in list3's regular_exclude_lists and finally put list5 in
list4's regular_exclude_lists.

Then if a post is addressed to all 5 lists, anyone who is a member of
list2, list3, list4 or list5 will not receive the post from list1 and
anyone who is a member of list3, list4 or list5 will not receive the
post from list2 and so on. See the (Details for regular_exclude_lists)
link for more info.

-- 
Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan

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