Can someone explain this Sent thread sorting?

[Steffen Kaiser]

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On Tue, 28 Oct 2014, Philip Rhoades wrote:

> I attach a screen capture of my RoundCubeMail Sent box - why does the second 
> item on the list, which is a separate reply to the thread above it, get 
> sorted to position 2?  By the date, and being a single mail, it should be 
> much further down the screen . . I presume it is because the Subject is the 
> same?

Threading bases on Message-ID, References and In-Reply-To headers. What 
are they of the messages with similiar looking subject?
Of course, some MUAs may take the subject into account, too.
Second, you should verify, if Roundcube uses Dovecot for threading. If 
not, you should ask on a Roundcube list.

- -- 
Steffen Kaiser
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