Just wanted to add that Erwin Hoffmann has actively maintained s/qmail (and related djb tools) for quite some time. =) Please feel free to check his website:
Yes, and while I haven't run s/qmail myself, I have sometimes borrowed (and then usually refactored) some of his code, and have frequently collaborated with him on improving ucspi-tcp6, ucspi-ssl, etc. I'm still hoping he'll consider participating in notqmail development.