Eliminate Duplicate Emails
I'm trying to find a way to eliminate duplicate email messages.
I can do this easily in procmail with the following rule, but am unable to have users call procmail from Zimbra, and can't find a "No Duplicates" feature in the mail filters section.
:0 Wh: msgid.lock
| formail -D 32768 procmail.NO_DUPLICATES_MESSAGE_ID_CACHE
Is there any way to do this today?
Zimbra supports a memory-based version of this (i.e. it does not persist through server restarts). Set the "zimbraMessageIdDedupeCacheSize" attribute on the server's configuration and the server will keep that many recipient/Message-ID pairs in a FIFO map, dropping any duplicates it sees.