[Mailman-Users] Can this be done using Mailman?

DAve dave.list at pixelhammer.com
Wed Aug 8 20:26:30 CEST 2007

Brad Knowles wrote:
> On 8/7/07, DAve wrote:
>>  The client is asking for the ability to manage list messages in a new
>>  way. We are unable to do so using our current software, ezmlm. Here is
>>  the scoop. The client has twenty mail lists, and subscribers can sign up
>>  for any number of lists. The client wants to be able to send a common
>>  message to some lists without sending duplicate messages if a subscriber
>>  is on more then one list.
> Mailman is able to eliminate some duplicate messages, depending on the 
> exact nature of the situation.  In particular, if the headers show that 
> a certain address is a named recipient in the "To:" or "Cc:" headers but 
> is also a subscriber to the list, then the additional list copy can be 
> avoided.
> However, one list has no idea what the other lists are doing, or what 
> traffic may have already been sent through there.  So, if the same 
> message is posted to multiple lists and the same person is subscribed to 
> multiple lists, then they'd still get multiple copies.  I don't see any 
> obvious way around that problem.


>>  As we understand it you can have topics, and subscribers will only
>>  receive messages directed at the topics they subscribe to. This means a
>>  subscriber could subscribe to [members], [stores], and [retailers], if
>>  we send a message to [stores] they will receive it. If we send a message
>>  to all topics, subscribers will receive only one message. This is what
>>  we want.
> As far as it goes, that sounds correct.
>>  However, if we send a message only to [stores] and to [members],
>>  subscribers will receive two copies. This is not what we want.
> If there's just one list, with multiple topics, then a recipient on that 
> list should only get one copy of the message, even if they're subscribed 
> to multiple topics.
> At least, that's the way I understand it.

So in the idea of an announcement only list, we should be able to have 
the list owner post a message to multiple topics, correct? I did not see 
where cross posting a message to multiple topics within a single list 
was possible. Do you know if it is?

>>  It is not clear to us from the docs or from any information we have been
>>  able to find. Thanks,
> If I haven't been able to clarify this issue for you, please let me know.

Thank you very much.


Three years now I've asked Google why they don't have a
logo change for Memorial Day. Why do they choose to do logos
for other non-international holidays, but nothing for

Maybe they forgot who made that choice possible.

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