[OSX-Users] Re: [iOS-Users] mail on yosemite slow/clunky?

[Tim Chown]

> On 2 Mar 2015, at 18:43, Vladimiro Sassone <vsassone at soton.ac.uk> wrote:
> 
> (Even tho this is the list of iOS, not OS X,) Mail.app was fantastic but
> itąs now seriously misbehaving re attachment. Yosemite has forced me to
> use outlook, which is a serious defeat. Itąs sluggish and slow, but at
> least it works.
> 
> Mail.app under Yosemite in not slow for me, speed is about the only thing
> that is ok with it. For the rest, it messes up attachments badly (does not
> remove them, when it does might garble the entire message forever). It
> messes up threads, including unrelated messages (that eg may be have a
> similar subject). I have rebuilt the index many times, doesnąt help, the
> only thing that works (till the next attachment is removed, of course) is
> to remove the account altogether and then readd it, so that all messages
> and attachment are downloaded again from the server. Or alternatively, use
> OutlookŠ

I see similar things - Mac mail threads mixed up, which means I can no longer ever delete a thread without expanding it for fear of deleting an ‘important’ email.

There’s no apparent pattern. I’d assumed the threading was done by Message-ID and In-Reply-To headers, but that’s clearly not happening here. Mac Mail is trying to be cleverer, somehow.

This article seems relevant. I guess I need to disable View by Conversation, which from an email management efficiency point of view is very bad.
https://support.apple.com/kb/PH19153?locale=en_US&viewlocale=en_US <https://support.apple.com/kb/PH19153?locale=en_US&viewlocale=en_US>

Or is there a fix?

Tim
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