15.37. Why isn't the reply address of the list set to the list?

The ezmlm FAQ explains why this is not recommended.

Manuel posted the following explanation to the list on May 12, 2003.

It will stay this way because I read this:
and found that they're right - I can live with the fact that people have
to think twice before posting anything to the list. :) Besides, other
lists behave in the same way, too (including soekris-tech and
freebsd-small), and every better MUA has got a "Reply All" function, so
that issue is settled as far as I'm concerned.

Also see The Great Reply-to Debate in the book Producing Open Source Software.