There seem to be a number of e-mails sent to the lists that are new
messages but are sent as a reply to other messages - like people are
choosing the "reply to" option, and then just replacing the subject
with something new and then putting something new in the body.
Please do not do this. Add the appropriate mailing list to your address
book and start a new message.
When a message comes from the list, there is a header with a message ID
in it. The header is called Message-ID.
When you reply, your mail client sends the message specifying that it
is in response to that Message-ID.
This means that people who use e-mail clients that offer a threaded
view, your message will end up looking like a response to a message
rather than a completely new message. The result is that less people
will see your message, because some will not be interested in the
particular e-mail you responded to to create your message, resulting in
them not bothering to look at responses.
It also is a pain for those who are eager to see responses to a
particular thread, because then your completely different message shows
up in there.
With both Evolution and Balsa, and I assume with kmail too, it is
trivial to add the mailing list to your address book. If you are having
trouble doing so with your mail client, a question to the Fedora Users
list can help out.