The standard BIND resolver library accounts for a huge chunk of the space taken by each qmail-remote process. A future version of qmail will support a new, much smaller DNS library. This library has been released first as part of a separate package, djbdns . My new dynasub package will accept subscription requests from local users and negotiate subscriptions with remote mailing lists. It will automatically set up a local sublist for each remote list, to speed delivery and protect user privacy.
Clients run mini-qmail to pass all mail to a central server.
The qmailanalog tools no longer require that you keep qmail's entire log. They store crucial information in a table on disk.