162.96 KB, image/jpeg
Created attachment 8873887 [details] Image of Thread pane with detached reply prior to thread. Windows 7 Ultimate SP 1 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.1.1 View > Layout > Wide View View > Sort by > (Date, Ascending, Threaded) Protocols: POP3 and SMTP When messages are sorted by date-time, threaded messages appear in the Thread pane sorted according to the date-time of the last message in the thread. This is a result of bug #20385. There should be an option to sort according to the date-time of the first message in the thread. When a thread is broken (e.g., a newsgroup reply is received via a linked listserv or via GoogleGroups, an E-mail reply is received from an E-mail client that does not support threading), replies become sorted by date-time away from the rest of the thread. This is seen in the attached image for the mozilla.support.thunderbird newsgroup. This bug report replaces bug #1369591.
As a workaround use sort by 'Order Received'. This is still sorted by the first post. But see also Bug 254159 & Bug 383985 ;-)
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