It's not qmail. It's also not netqmail.

We all use email, so we all use email servers. notqmail is software for running an email server. Someday, if we do a good job, some of the many articles about how and why to run your own will recommend notqmail.

notqmail is a community-driven fork of qmail, beginning where netqmail left off: providing stable, compatible, small releases to which existing qmail users can safely update. notqmail also aims higher: developing an extensible, easily packaged, and increasingly useful modern mail server.
https://github.com/notqmail/notqmail/wiki