qmail in the public domain?

There's a thread discussing Dan's ``Some thoughts on security after
ten years of qmail 1.0'' paper, but I haven't seen any mention on the
slides to the corresponding talk[1].  Namely, page 10 says:

    2007.11: $500 -> $1000;
    qmail placed into public domain.

Does this mean what I think it does?  

[1] http://cr.yp.to/talks/2007.11.02/slides.pdf