Dear All,

The DirectFB email lists seem to be suffering from duplicate messages.  
(I'm subscribed to the digests.  Maybe non-digest readers are not 
affected.  Can someone confirm?)

I believe that the problem occurs if you send a message to BOTH the dev 
and the users lists.  You'll notice that I am sending this message to 
both lists, and if my theory is right it should appear twice on each 
list.  Here's my theory:

- My mail server sends one copy of the message to directdb-dev.  It 
reaches mailman, which looks at the To: line and sees that the message 
is addressed to both lists, so it sends it to both lists.
- My mail server sends a second copy to directfb-users.  It reaches 
mailman, which looks at the To: line and sees that the message is 
addressed to both lists, so it sends it to both lists.

So both lists end up with two copies.  (If we had 3 lists we'd get 9!)

I am not sure if there is some sort of tweaking that could be done to 
the MTA / mailman configuration to avoid this.  Google finds lots of 
talk about mailman and duplicate messages, but I can't see anything 
that exactly aligns with this problem.

However,  I would like to encourage readers to avoid sending messages 
to both lists.  Most questions fall into either the "users" or the 
"dev" category; if you're not sure which list, why not post to one and 
then try the other if you don't get a reply?  I suspect that most of 
the people who are likely to answer are subscribed to both.


Regards,

Phil.





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