The mailing list for listmasters using Sympa

[Jean Charles Delépine <address@concealed>]

Quoting "Widerski, Betty" <address@concealed>:

> Not an implementable solution, but if your subscribers are using  
> M365/Exchange for email we find that Microsoft “sees” the duplicate  
> messages and only delivers one of them. Which is confusing to list  
> owners who subscribe themselves to the multiple lists and then think  
> the post didn’t go to all of them because they themselves didn’t  
> receive a copy from each list.

It's an option on cyrus, I guess it's an option on 365 and Gmail too.
   duplicatesuppression: 1
      If enabled, lmtpd will suppress delivery of a message to a
      mailbox if a message with the same message-id (or resent-mes‐
      sage-id) is recorded as having already been delivered to the
      mailbox.

I desactivate it on my servers because when you subscribe several
list you want all their mails and threads. And duplicate suppression
is easily done with most users mail clients.

         Jean Charles Delépine
--
Service systèmes et réseaux - DISI

Université de Picardie Jules Verne
5, rue du moulin neuf - 80000 Amiens