For starters, you need to turn off digests if you ever hope to contribute to the list effectively. Go to
https://listmaster.pepperfish.net/cgi-bin/mailman/listinfo/lua-l-lists.lua.org and scroll to the bottom, and enter your email address in the bottom field ("unsubscribe or edit options"). Get to the settings page (you may need to retrieve your password first) and look for Set Digest Mode. Then turn it OFF. That way you will receive individual emails as they come in, and will be able to reply immediately and with proper threading (replying to the digest breaks threading in everyone else's mail clients).
