Apple Event: May 7th at 7 am PT
When Mail in Lion detects duplicate messages in a mailbox, it groups them together and shows the link in the header "x Duplicates", where x is the number of duplicate messages found. When that link is clicked the duplicate messages show in the mailbox separately. But I'd like Mail to stop grouping them together to begin with.
Running OS X 10.7.3 and Mail 5.1
Mail-OTHER, Mac OS X (10.7.3)
If you would have bothered to read the entire conversation you would have noticed that this question has nothing to do with Conversation View and besides, the problem has already been solved.
Another solution is to disable Mail's detection of duplicate Message-ID's.
See this this excellent suggestion by Tom Francais:
https://discussions.apple.com/thread/3755752?start=0&tstart=0#18265121
In short, use the Terminal to change Mail's hidden setting after quitting Mail.app:
defaults write com.apple.mail AlwaysShowDuplicates -bool true
From then on Mail will happily show all messages with duplicate Message-ID's.
Kevin Strong wrote:
...
Of course, Apple should still really fix the bug they have of false detection of duplicates, but I don't to worry about that now.
False Detection? Kevin Strong is correct. Email duplicates are falsely detected, and this can lead to loss (not being able to find) important email.
Worse yet, if you want to prove in court that you sent something, it might not be enough to show a copy from your Sent folder, because the SENT copy does not contain the HEADER information that a received copy contains.
For that reason, I always Bcc a copy to myself, and keep the copy I recieve (not the copy in my Sent Folder.
When searching for an email (subject:evidence), I might only be shown the copy in my Inbox, leaving me to believe that I somehow deleted the copy with the important header information.
Thanks also, to Tom Francais for the solution for turning off this new "feature".
In later versions (Mavericks, Yosemite, El Capitan) we need to use the updated command:
defaults write com.apple.mail _AlwaysShowDuplicates -bool true
How to disable detection of duplicate messages in Lion Mail?
