I just posted: >When editing my log files I've noticed that some of the messages have a >header line In-Reply-To:. Is this something that Listserv is, or will be >using, when threading the archives? In other words, is there a reason for >me to save this header line? Apparently this isn't what I thought it was, a newsgroup type of reference to the prior message. They are all the same! The example being: In-Reply-To: <[log in to unmask]> Don.