All, I've been on this list for some time now but lately it seems that the mail is no longer threaded properly. That is, the replies to some messages create new threads in my client (Evolution 2.0.4). A lot, but not all of the mail that should be threaded comes from Microsoft clients (shame on you :-)) and do not have the information in the header that evolution seems to need for threading. Evolution is not threaded by subject, but by the In-Reply-To: or References: header items, I guess. In Evolution 1.4.? there was a configuration option to thread by subject. It had to be hand edited. I do not think this exists in Evolution 2.0.x. Am I the only one seeing this? Do I have something configured incorrectly. BTW: FC3 both x64 and i386 architectures, both Evolution 2.0.2 and 2.0.4 exhibit this. Thunderbird seems to thread by subject. For instance, in Evolution, the thread entitled "Yum problems for fedora-extras...." has the original message and one reply from Paul Howarth in the thread, but there are four more unthreaded replies from "Irving, Dave". The four replies from Dave Irving (through MS Exchange) do not have In-Reply-To: or References: entries in its header, but do have Thread-Topic: and Thread-Index: entries. The Thread-Topic: is the subject of the original posting. In Thunderbird the original message and all of the replies are in a single thread. Bob...