I wanted a raw archive in Unix mailbox format so I can feed it to Google Groups. It looks like you scraped the SL4.org website, in which case I'd have to reverse the email-to-HTML process that SL4.org used, which I'd like to avoid if possible. BTW, I would ask Eliezer directly for the raw archive, but I did that a few years ago and he didn't respond.
Pretty much free to ask again. Ping him as a reply to your original email?
This is probably of interest only to the old-timers here. (Ironically, as a cross-post, this is almost by definition spam for LW, since anyone really interested in the topic would already be subscribed to SL4 and would have seen the emails.)
In 13 March, I finally got around to a long outstanding bit of cleanup: suggesting that the equally long defunct SL4 list be formally closed, things tidied up, and the lights turned out. The suggestion met with a mixed (and muted) reception.
Last night I followed up with a second email comparing SL4 activity to activity on Extropy-chat, LW, OB, and MoR; it won't surprise anyone trying to drink from the firehose here that LW is approximately 3 orders of magnitude more active than SL4 is.