Wesley, Thanks for replying and copying to me.
wl> Well, if your web-based MUA supports it, it can and should do threading correctly. No evidence that this MUA supports threading, that I have seen. wl> Barring that, as long as the subject stays intact, often other people's MUA will do pseudo-threading by subject line if there is no other threading information in the headers. Not clear about this. Are you saying I should try to use a MUA which belongs to a colleague and which supports threading? In any case, most readers reply to the list and do not copy to me. I am not subscibed to the list because the volume is so large. So I can not use the reply capability in a MUA. To propagate the subject I must copy it to the clipboard in the browser and thence to the subject field in the MUA. Will try it. Thanks, ... Peter E. http://carnot.pathology.ubc.ca/