Re: avoiding duplicate messages with multiple lists

Quoting Jamie Zawinski <[email protected]>:

> Say I have three smartlist lists on the same host.  I send a single
> message to all three lists:
>
>     To: listA, listB, listC
>
> If all three lists contain the same subscriber, that person gets
> three copies of the message.  All three copies have the same
> (original) Message-ID, but different Resent-Message-IDs.
>
> Is there any way to cause that person to only get one copy of the
> message instead of three?

SmartList can do nothing here without heavy modifications. It's rather  
a question of duplicate delivery suppression on the recipient or MTA  
site. E. g.
the cyrus imap/pop3 server would deliver only one copy (with the default
configuration). Probably there is also a solution at the MTA (postfix) side.
You should ask the postfix community.

  Werner