Comment 1 for bug 822358

Presumably, you are talking about the archive periodic text files. Compression of these files is a holdover from the days of much more limited bandwidth. It makes no sense in today's internet. It actually consumes additional space on the server because the uncompressed files are still kept along side the compressed ones. Further, depending on the configuration of the web server, the compressed file may actually be uncompressed before transmission to the browser.

For these reasons, I recommend you remove the cron/nightly_gzip job from Mailman's crontab and remove any archives/private/LISTNAME/PERIOD.txt.gz files from the server. Then, the next time the archive TOC page is updated, all the links will revert to the .txt files.