Helios qmail is an advanced qmail distribution
based on qmail-sql. It has SMTP, SMTPS, POP3,
POP3S, IMAP, and IMAPS services, a content
scanner, antispoof and SPF support, SMTP-AUTH,
SMTP-after-POP/IMAP, a PHP5 API, and many other
useful tools.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
This is probably the last beta release; the next version (1.0.0) will be the first production use release. Only the notification backend is still in development. Many API improvements were made, and now it's possible to develop advanced system tools, Web applications, etc. User settings manipulation tools were added that allow for showing the current configuration, enabling/disabling it, and modifying it.