>When you reply to one of these email list things, *DO* *NOT* *CHANGE* *THE*" >*SUBJECT*:" *FIELD*! > >Most subscribers to the IETF (and most other) list(s) need for everything >received from said list(s) to be appropriately labeled in the "Subject:" >field. ... You might consider getting a better mail client. There are plenty that can thread on References: and other headers. I find it more annoying that threads drift and end up having nothing to do with the unchanged subject line. The message I was replying to is a classic example. R's, John PS: I'm a total troglodyte so I pipe my list mail into a local news server and use trn. Works great, mostly.