by Nobbie » 02. January 2021 13:13
You did not tell us that you did not install Xampp (this is the Xampp Forum, Apache from Xampp) and you did not tell us your Apache release. Seems to be an older one, which does not know "Require", instead uses "Allow From..." and "Deny From...." in your config. See your Apache Documentation about Allow and Deny.
Actually, i will warn you, if you really add Deny from all to that configuration, NONE of mailman URLs will work. Same for manual, none of them will work anyway. I think you added the Alias for a certain reason, that wont work any longer. I dont know what you are doing there, but it looks as if you need mailman and manual for a tool or so.