I currently use Thunderbird 17.0.2 (on Windows) As one example, the recent thread "Session Time Model Issue" was _extended_ to the new "0day virus" thread on Jan 12 @ 14h15. A review of the headers indicates this was a "Reply-To". In Thunderbird, the thread starts with Session Time Model Issue and the 7th reply becomes a different topic, but under the the "Session ..." thread tree. I've often wondered whether this is a user or a program glitch. /Hans On 14/01/2013 12:45 PM, Ryan January wrote: > I can verify this threading behavior in Thunderbird (17.0) on Ubuntu > (12.04). > > On 01/14/2013 01:34 PM, Guillermo Alan Bort wrote: >> now I have to ask. What mail client do you use? I have a few accounts >> centralized in my main gmail account (as you may have noticed this is >> not >> my "work" addres...) and I get threadding done by subject. I use the >> gmail >> web client, though, and sometimes, especially for customer >> relationships it >> might be useful to get a more advanced threadding system... I have >> outlook >> installed... but it's not nearly good enough. >> Cheers -- //www.freelists.org/webpage/oracle-l