Dear Sebastian,

There are several ways (functions provided by Maehara-san):

(1) Message lists similar to old ones:

http://ooruri.kusastro.kyoto-u.ac.jp/mailarchive/vsnet-alert/msglist http://ooruri.kusastro.kyoto-u.ac.jp/mailarchive/vsnet-chat/msglist etc.

(2) Old type format URL: like http://ooruri.kusastro.kyoto-u.ac.jp/mailarchive/vsnet-chat/8965

(3) Old messages as before http://ooruri.kusastro.kyoto-u.ac.jp/mailarchive/vsnet-chat/8500

but until some days ago I noticed that the old archives up to August 2021 were still online, but now they aren't anymore.

Something may have been changed. Meahara-san, could you check what happened some days ago?