In article , charlie b
wrote:

It does raise an issue though. Once it's on the net it seems
to be out there forever and accessable to everyone. At what
point does it become public domain - only when it's used
for profit?

Not making it public domain means he is explicitly retaining copyright.
Considering it was posted in a public, archived medium to begin with I
am not terribly concerned about the implications of reposting.

djb